Official

First of all, I have to explain Izu stone.

Izu stone is a general term for stones that can be collected in Izu, and is classified into hard andesite (* 1) and soft tuff (* 2). Among them, the one that was quarried in Izu during the Edo period and transported to Edo was mainly andesite, and was called "Izuishi", including Manazuru and other from Nishi-Sagami.

Ieyasu Tokugawa entered Edo Castle in August 1590 (Tensho 18), and since then repeatedly repaired Edo Castle, and in June 1604 (Keicho 9), quarrying and transporting stone materials to 28 Saikoku Daimyo. I ordered it. However, there was no suitable stone in Edo, which was covered by the Kanto Loam Formation, so Izu (mainly the area from Hayakawa and Manazuru in Nishi-Sagami to Inatori in Izu), which was close to Edo and was under the direct control of the Shogunate. The high quality "Izu stone" was focused on and was quarried and transported.

（※1） Andesite is a rock in which magma is rapidly cooled and hardened near the surface of the earth and is classified as volcanic rocks in igneous rocks. The color is dark gray and gray, and it is hard and fire-resistant, so it is used for civil engineering, building materials, tombstones, etc.

（※2） Tuff is a rock formed by volcanic ash erupted from a volcano deposited on the ground or underwater, and is classified as sedimentary rocks. The colors range from white / gray to dark green / dark blue / red, and are light, soft and still resistant, so they are used for stone walls and stone warehouses.

By the way, it was good to see Edo Castle because of Izuishi, but most of Edo Castle is located in Chiyoda-ku. When I was wondering if there was a remain of Edo Castle located in Chuo-ku because of the Chuo-ku Tourism Association correspondent blog, I noticed that the stone wall at that time still remains at the site of Tokiwa Hashikado. I decided to go to the site of Tokiwa Hashikado.

The site of Tokiwa Hashikado seen from Jobanbashi. Hashigami's roadway (the whitish part on the left) is granite, and the sidewalk (the dark part on the right) is andesite.

Lower left) Jobanbashi and Tokiwa Hashikado ruins over the Nihonbashi River

Right) Tokiwa Hashikado ruins seen on the Chuo-ku area map (top is north)

I went to the site of Tokiwa Hashikado (2-chome, Nihonbashi-Honishicho, Chuo-ku-2-chome, Otemachi, Chiyoda-ku). There is no castle gate now, but the stone wall at that time remained as it was.

The Tokiwa Hashikado site is attached to the Joban Bridge over the Nihonbashi River. The Joban Bridge was damaged in Great East Japan Earthquake and restoration work was being carried out, but the construction was completed in May 2021, and it was reborn as a very beautiful stone arch bridge.

The site of Tokiwa Hashikado is located in Tokiwa Bridge Park. There was an explanation board about "Tokiwa Hashikado" in the park, and the following explanation was given.

＞Tokiwa Hashikado was built in 1629 (Kanei 6) by the Daimyo of Dewa and Mutsu. The gate is one of the Edo Goro, which leads to Oshu Dochu among the Edo Castle gates, and was also called Asakusaguchi and Ote (large)guchi. It was positioned as an important military gate because it was connected to Otemon Gate, the main gate of Edo Castle retrenchment.
　The structure of the gate is a Masugata gate in the form of an inner masugata gate. There is a ferry tower on the north side and a stone wall supporting it, and a large guardhouse is located at the end of the gate. In addition, there was a crown gate on the east side, and the other three sides were banks.
　After the Meiji era, the building of Tokiwa Hashikado was destroyed. A part of the remaining Masugata stone wall, the Joban Bridge (Ishibashi) built in 1877 (Meiji 10), and the stone masonry part of the bridge were designated as national historic sites in 1928 (Showa 3).

There is also the Tokiwa Bridge Outdoor Museum in the park, where many relics and old materials from the restoration work of Joban Bridge were preserved. And there was an explanation board with the word "andesite", and the following explanation was given.

＞Joban Bridge is the only arch bridge that remains to date among the arch bridges planned to be constructed at 15 locations in Tokyo in 1877. The main stone was broken wood from Koishikawa Gomon, one of the Mitsuke gates of Edo Castle outer moat. For this reason, many andesites carried from Izu Peninsula are used in the stone transfusion under the arch, similar to the Masugatamon Ishigaki.

Andesite preserved in the Tokiwa Bridge Outdoor Museum. In addition, many relics and old materials from the restoration work of Joban Bridge are preserved.

Regarding Joban Bridge, in Chiyoda-ku, 2016, the roadway part was granite and the sidewalk part was explained as andesite.

From the above, it was confirmed that Izu stone (andesite) was used for the stone wall at the site of Tokiwa Hashikado and Jobanbashi.

In addition, please see "Know Chuo-ku about Chuo-shi / Chuo-ku homepage" for more detailed explanation of Tokiwa Hashikado ruins.

Then, in the next remain of Edo Castle, there is no place to think of.

So I visited the Kyobashi Library Regional Archives, where I always consult when I was in trouble, and asked me that there was probably no remain existing in Chuo-ku. However, we asked three cases of stone wall stones excavated during the excavation survey in the ward were considered to have been andesite carried from Izu, and decided to go there.

The first is the site of the Yanagihara embankment (2-7, Nihonbashi Bakurocho, Chuo-ku).

The archeological site was discovered during an excavation survey in 2008 at the site of the Yanagihara embankment on the southern shore of the Kanda River on the west side of Asakusabashi over the Kanda River, which runs east in the northernmost part of Chuo-ku. The bank was built in 1620 after the Kanda River was excavated in 1616, and was built in 1620 at the expense of the Matsudaira Echizen family in Kanei 13 (1636). It is said that it was an important stone wall of Edo Castle outer moat. The south side of the bank ruins is Yanagihara Street, and the school building of Kaichi Nihonbashi Gakuen is currently facing the street.

In order to check the situation and overall picture around the archeological site, first cross Asakusabashi and go to Asakusabashi Park (1-1-15 Asakusabashi, Taito-ku) on the west side of Kitazume, and the Asakusa Mitsuke Ruins Monument was built. Was. During the Edo period, Asakusabashi played a role as a military facility to protect Edo Castle as Asakusa Mitsuke attached to Asakusa Hashikado. In order for foreign enemies to enter the castle, they had to cross Asakusabashi and pass through the second gate, turn right at Masugata, and break through the first gate, Asakusa Hashikado (Masugatamon).

A monument to Asakusa Mitsuke, which stands in Asakusabashi Park. Asakusa Mitsuke was one of the 36 Mitsukes of Edo Castle and was a military facility established to protect Edo Castle from foreign enemies. The building seen on the other side of the bridge is Kaichi Nihonbashi Gakuen's school building, and when rebuilding the school building, an excavation survey was conducted at this place.

Below) Yanagihara embankment ruins seen on the Chuo-ku area map (upper is west)

Next, cross the Asakusabashi and return to Minamizume, and then go a little west along Yanagihara-dori. There is a stone wall stone in front of Kaichi Nihonbashi Gakuen's school building. When I approached and looked at the explanation board, it was written as "Ishigaki stone from the Edo period that was excavated." I didn't expect that I would be able to face Ishigaki stone at that time here, so I was very impressed and my tension increased.

Left) Ishigaki stone displayed in front of Kaichi Nihonbashi Gakuen's school building. It matches well with the orange viola.

Right) The south side of the school building is Yanagihara-dori (the road on the left side of the photo in the upper right), and there is an entrance (the lower right photo) facing the street.

The explanation board provided the following explanation.

＞The place where this stone was excavated is about 5,60 meters west from here. It was a bank called Yanagihara embankment along the Kanda River throughout the Edo period. The Kanda River also serves as a moat for the defense of Edo Castle, and on the south side of Asakusabashi, there is a castle gate called Asakusabashi Gomon, which is the northeastest of Edo Castle, and this area is an important location within Edo Castle.
　This stone was discovered about 1m below the ground during an excavation survey conducted from December 2007 to May 2008. It is an andesite stone carried from around Izu Peninsula. These stones were found around six steps, piled up at a height of 3 to 4 meters. This is a stone wall that solidifies the defense of Edo Castle. It may have been meaningful to reinforce the south side of the bank. It was built for a long time in the east and west along the shape of the bank.
　This is a new discovery material that proved that a stone wall was built here for the first time during this excavation survey, and it is a valuable excavated artifact that shows that this area was a corner of Edo Castle.

A public relations officer at Kaichi Nihonbashi Gakuen said, "When the stone wall breaks the old school building and builds a new school building, an excavation survey was conducted by the Chuo-ku Board of Education, and relics such as Setomono. Excavated with The rest of the stone walls and most relics have been backfilled, so the ruins are still sleeping under the school. The excavation was a very valuable experience because the volunteers of the school helped me. "

In addition, "Chuo-ku Board of Education" Yanagihara Dote Ruins Site, Chuo-ku, Tokyo "Nihonbashi Jogakukan, Chuo-ku Board of Education, 2013, P.165" had the following descriptions. .

＞As a stone wall similar to the site of the Yanagihara embankment site, in Chuo-ku, the Matsudaira Echizen Moriyashiki site, which investigated the site of the Matsudaira Echizen family, the Tokugawa parent clan, which had been 500,000 stones in the middle leaves from the early 17th century. There is. The stone wall shown seems to have been built by surplus stone materials from the contracting of the Echizen family's lower house outside Asakusabashi in 1636. In addition, the stone wall of Edo Castle outer moat, which was detected at the site of Marunouchi 1-chome in Chiyoda-ku, was constructed by outer moat in 1636. It is considered to be a percussion mattress, but it is slightly collapsed, and the scale of the stone is similar to those of the Yanagihara embankment site and the Matsudaira Echizen Moriyashiki site site.

From the above, it was confirmed that the stone wall excavated from the Yanagihara embankment site was also Izu stone (andesite).

The second is Matsudaira Echizen Moriyashiki, which was also described in the "Chuo-ku Board of Education" Yanagihara Dote Ruins Site, Chuo-ku, Tokyo "Nihonbashi Jogakukan, Chuo-ku Board of Education, 2013" It is archeological site (2-23 Shinkawa, Chuo-ku).

The archeological site is located in Shinkawa, where I work, and is located just a short walk from the Shinkawa 2-chome intersection where Kajibashi Street and Yaesu Street intersect toward Chuo-ohashi Bridge over the Sumida River (lighthouse was dark).…）。

Shinkawa was once called Reiganjima Island, and in the first year of Kanei (1624), Reigan Jojin gathered the people and reclaimed the seaside to build Reiganji Temple (see "Nine bridges over Shinkawa (Second series: Reigishi Bridge, Shin Kamejima Bridge, Kamejima Bridge) "). In Kanei 11 (1634), the third generation of the Matsudaira Echizen family, Tadamasa, worshiped the land around the archeological site, and has since been used as the residence of the family throughout the Edo period.

Upper left) Ishigaki stone of Echizen moat displayed at Echizenbori Children's Park (1-12-1 Shinkawa, Chuo-ku) in front of Akimasa Elementary School (1-12-1, Shinkawa, Chuo-ku)

Lower left) The stone in the upper left photo was taken from behind, and you can see that there is an arrow hole (a hole carved to break the stone, and has a square shape). .

Right) Matsudaira Echizen Moriyashiki ruins seen on the Chuo-ku area map (upper is east)

The excavation was conducted in 2006, and the stone wall excavated at that time was displayed at Echizenbori Children's Park, and the explanation board has the following explanation.

＞The stone displayed here was used for the revetment of Echizen moat called "Ishigaki stone". In 2006, it was found during an excavation survey of archeological sites conducted at Shinkawa 2-chome. A part of it has been relocated near the moat trace in this park with a connection.
　In the Edo period, this area was the site of Fukui feudal lord, Echizen Province and Matsudaira Echizen Mamoru. The mansion was surrounded by moats on three sides, and this was called "Echizen moat". The revetment of Echizen moat is masonry, which can still be excavated during civil engineering work and archeological surveys. The moat has a width of 12 to 15 (about 20 to 30 m), and it is also used as a canal, and it seems that a small boat loaded with cargo passed.
　In the Meiji era, the site of the mansion became the name of "Echizenbori", but the moat was gradually reclaimed. After the Great Kanto Earthquake of 1923 (1923), most of them were reclaimed, leaving a part, and the part close to the Sumida River, which remained slightly, was completely reclaimed after the war. After that, the name of the town was changed, and it became "Shinkawa" and is now.
　Now, the name of "Echizenbori", which survives the past, is only found in this municipal Echizenbori Children's Park.
　This park begins with Echizenbori Park, one of the "Teito Reconstruction Small Parks" created after the Great Kanto Earthquake.

In addition, "Chuo-ku Board of Education" Matsudaira Echizen Moriyashiki Ruins, Chuo-ku, Tokyo "Win Corporation Co., Ltd., Chuo-ku Board of Education, 2010, P.32" had the following descriptions. .

＞The stone wall used for the stone wall is made of andesite with a square cone.

Based on the above, the description in “1-2. Yanagihara embankment site site” states that “the stone wall similar to the one of the Yanagihara embankment site site is (omitted) Matsudaira Echizen Moriya site site archeological site” The stone wall excavated from the Matsudaira Echizen Moriya site site was also confirmed to be Izu stone (andesite).

And the last third is Marunouchi 1-chome, which was also described in "Chuo-ku Board of Education" Yanagihara Dote Ruins Archeological Site in Chuo-ku, Tokyo "Nihonbashi Jogakukan, Chuo-ku Board of Education, 2013" It will be archeological site (1-1-40 Marunouchi, Chiyoda-ku).

outer moat is located south of Tokyo Station, northwest of the Kajibashi intersection where Kajibashi Dori, which runs east and west, and Sotobori-dori St., which runs north and south, intersects. Excavations were conducted twice from 1996 to 1998.

The address of the archeological site is Chiyoda-ku, but it is located adjacent to Chuo-ku with Sotobori-dori St. as the border. Speaking of which, along with Tokiwa Hashikado and Asakusa Hashikado, the Kajibashi Gate introduced here is also one of Edo Castle's thirty-six Mitsuke, and it is common that it was built in the outer moat of Edo Castle, which is the border of Edo Castle.

Upper left) Blacksmith Bridge attached to the Kaji Bridge Gate and spanned the outer moat (from "Yamada Yoneyoshi, late Tokugawa shogunate Restoration Customs Photography History", Yamada Shumido, 1950". Provided by Chuo Ward Kyobashi Library

(Lower left) Near the ruins of the current Kajibashi gate. From the south side of Kajibashi Street, you can see the Marunouchi 1-chome archeological site.

Right) Marunouchi 1-chome archeological site seen on the Chuo-ku area map (top is north)

I visited, but there was no remain such as stone walls, and there was only an explanation board for the ruins of the Kajibashi Gate.

＞Kajibashi Gate was built in 1629 (Kanei 6). The Kaji Bridge attached to the gate connected the current Marunouchi 2-3-chome with Yaesu 6-chome in Chuo-ku.
　The name is derived from the fact that the street name outside outer moat was Minamikajimachi (now Yaesu 2-chome, Kyobashi 2-chome, Chuo-ku). Also, in the early Edo period, there was a mansion of the painter Kano Hiyu, a painter. A daimyo residence was lined up in the gate, and at the end of the year, the Matsudaira family of the Tsuyama clan (currently Okayama prefecture) and the Yamauchi family of the Tosa clan (currently Kochi prefecture) set up a mansion nearby.
　In 1873 (Meiji 6), the Kajibashi gate was removed with the Masugata stone wall. The bridge was rebuilt as an arch bridge in 1876, but when the outer moat was reclaimed for rubble after the war, the bridge disappeared.
　At present, the name remains at the "Kajibashi Bridge" and "Kajibashi Crossing".

According to the Marunouchi 1-40 Archeological Site Investigation Committee, Marunouchi 1-chome, Chiyoda-ku, Tokyo, Japan National Railway Clearing Corporation, 1-40 Archeological Site Investigation Committee, Marunouchi 1-40 Archeological Sites Investigation Committee, 1998, outer moat Fuken in 1636 It is said that stone walls were built by 61 western daimyo and the largest daimyo houses, and moats were ultimately dug. The 61 Nishikuni Daimyo, who was in charge of Ishigaki, was divided into 6 sets, and each group was assigned a place in charge, and each choba was assigned finely to each daimyo.

As a result of the excavation, based on the inscriptions engraved on stone walls and stone walls, the excavation site this time was led by the Bizen Okayama Domain Ikeda Family, and from the south, the Mita Domain Kuki Family, the Okayama Domain Ikeda Family, the Saeki Domain Mori family, the Nariwa Domain Yamazaki Family, and the Oka Domain Nakagawa Family confirmed that it was built by five daimyo.

In addition, the following description was made regarding the material of the stone wall in the same document (P.242).

＞According to the naked eye, the detected stones are all of the andesites and are believed to have been brought from the Izu Peninsula or Manazuru Peninsula.

Based on the above, the stone walls of Edo Castle outer moat, which were detected at the Marunouchi 1-chome site at the site of the Yanagihara embankment site and the Matsudaira Echizen Moriyashiki site, were discovered atandesite.

<Ishigaki of Edo Castle outer moat>

When I visited the site around Marunouchi 1-chome site, I mentioned earlier that there was no remain such as Ishigaki, and there was only an explanation board for the site of the Kajibashi Gate. However, at a later date, I discovered the stone wall near the Kajibashi Gate on the site of Marunouchi Trust City (1-8-1 Marunouchi, Chiyoda-ku).

Ishigaki stone stone found around the Kajibashi gate (there are eight large stones in the middle) 。 On the surface of the stone wall stone, there was also an arrow hole carved to break the stone.

As mentioned above, this is the confirmation of the stone wall that remains in Edo Castle etc.

Then, from here, I would like to introduce the castle stone that remains in Izu, the hometown of Ishigaki stone that has been confirmed so far.

First of all, the name is "Edo Castle Tsukiishi Hometown Plaza" (2832-1 Inatori, Higashiizu-cho, Kamo-gun, Shizuoka Prefecture), located in front of Izu-Inatori Station on the Izu-Inatori Line.

A number of castle stones on display in front of Izu-Inatori Station on the Izukyu Line. The photo below reproduces the appearance of carrying the cut stone on the shura.

Here, many castle stones cut out in the mountains of Izu to carry to Edo Castle (it was also called "shame stone" because they were not actually transported) are displayed along with the explanation board, making it look like a theme park of the castle stone. It was like I would like to introduce an explanation board on the wall of the station building.

＞In June 1604, Ieyasu Tokugawa announced the large expansion work of Edo Castle, and in that it issued an order to collect and transport stone materials for construction to be collected and transported to the western daimyo, and per 100,000 stones of stone height, 100,000 stones of Oishi (a stone that can be transported by hundred people) was imposed. Since castle stone materials were required to be dense, heat-resistant and easy to shape, solid rocks such as the andesite on the Sagami and Izu East Coast were used, and many stone materials for castle were cut out in each area of Higashiizu, facing the Sagami-nada Sea.
　In the Inatori district where these stones were collected, eight large cut stones called "Tatamiishi" with the inscription "Oshin Agematsudaira Tozamori" remain, and it is a quarry of the Tosayama Uchi family. In addition, there are still traces of choba that leave engraved stones such as nail crest, swastika crest, Igirder crest, and three-star crest. (Omitted)
　For more than thirty years from 1606, the renovation of Edo Castle continued, and at its peak, 3,000 stone boats loaded with two "Hundred Stones" made a round trip between Edo and Izu East Coast twice a month. It is said that (Omitted)

At "Edo Castle Tsukiishi Hometown Plaza", a series of steps to cut out stones at Ishichoba (a place where stones were broken or processed) in the mountains of Izu, put them on a shura, carry them to the port, and put them on a masonry boat. There was a panel that was explained very clearly.

Next is "Tatamiishi" (223-1 Inatori, Higashiizu-cho, Kamo-gun, Shizuoka Prefecture) also located in Inatori, Higashiizu-cho.

There were two stones in front of the private house, with a shime rope.

Two "Tatamiishi" placed in front of a private house. The upper part is the western stone, and the lower part is the eastern stone. I was able to hear valuable stories from residents of private houses.

The following explanation was given on the explanation board.

＞This castle stone in Designated Cultural Property, Higashiizu-cho has long been known as the Tatamiishi of Inatori.
　It is engraved on the side of the stone as "Oshin Agematsudaira Tosamori Junai", and there are ten in the same castle Ishigacho, indicating that it is a representative stone of the stone.
　The Great Edo Castle renovation, which began in Keicho 10 (1605) under the order of Ieyasu Tokugawa, was almost completed until the third shogun Iemitsu, until Kanei 13 (1636).
　At that time, a stone choba in Tadayoshi Yamanouchi, the daimyo of the section, Tosa feudal lord, was placed in Inatori, collecting a large number of castle stones, and working to complete 2,244 pieces of "Hundred People's Stone". This stone that remains today is a stone prepared to respond to the quarry order issued to the Tosa Domain.

When I toured "Tatamiishi", a resident of a private house came out and said, "This stone was originally on the sea side (south side of the private house), but a road was laid there. Because I was going to dispose of the stones, I asked the carpenters who happened to come here for three days and three nights and moved them to my current location. The stone here (west side in front of the private house) says "Oshin Agematsudaira Tosamori Junai", but the stone there (east side in front of the private house) is "Shinage Matsudaira Tosamori Junai", and since there is no character "go", I think this stone is a "yokozuna class" among the many stones near here. Ishichoba is located in the back mountain of Inatori Station, and I think that I used the river line to carry it to this point. "

The last one is Asahiyama Ishichoba in Atami City (542 Ajiro, Atami City, Shizuoka Prefecture).

Dochoba is located in Ajiro Asahiyama Park in Atami City. As I climbed a narrow mountain path against Ajiro Fishing Port, and when I saw the closed school Ajiro Junior High School, the destination was right there and it was about 10 minutes by car from the fishing port.

Asahiyama is a low mountain of about 160m, but the area was completely in the mountains. In the Edo period, Ishichoba was generally located in such a mountain, and daimyo divided stones here to make castle stones. Even so, I think it was very difficult to carry stones from here to the port again.

Left) It is a castle stone with arrow holes dug in the vertical line. There was only a stone yard around here, and moss-covered castle stones were seen here and there.

A map around Ajiro Asahiyama Park. As the name suggests, Asahiyama Park is famous locally as a place where you can see the Asahi well.

There was an explanation board, so I would like to introduce it.

＞During the large-scale renovation and renovation of Edo Castle from Keicho 11 (1606) to Kanei 13 (1636), Ieyasu Tokugawa, Hidetada, and Iemitsu, he ordered the daimyo of various countries and encouraged castle to transport stone materials from Izunokuni (Shizuoka Prefecture). The mining of stone was carried out from Manazuru in Sagami Country (Kanagawa Prefecture) to Inatori in Izu, but the allocation of stones provided by the daimyo as a duty at that time was 1,020 stones with 100 people per 100 stones per 100 stones per 100 stones per 100 stones. There are also 30 Izu boats per month between 20 Izu boats and 30 round trips. This is also the site where the stone was cut off, and the daimyo of Kumamoto castle owner Tadahiro Kato, Tadaoki Hosokawa Kokura castle owner and Suminobu Omura Omura castle owner were in charge of this area, and the stone materials found here are engraved by the Daimyo who was in charge of one of the remaining cutting stones carried at that time.

The above is the introduction of the castle stone that remains in Izu.

Izu's castle stone spot introduced this time (using "Geographical Institute Map / GSI Maps | Geographical Survey Institute" and posting comments on the map)

In the wake of the trip to Izu, I had the opportunity to check Izu stone this time, but the more I looked up, the more the castle stone (Ishigaki stone) transported from Izu was not limited to Edo Castle, but also the buildings and infrastructure under the castle. I found that it was also used. In addition, I actually went to Izu and was surprised by the large number of castle stones.

The stone wall stone remaining at Edo Castle etc. confirmed in this blog, and the stone stone remaining in Izu, which I introduced, are only a few, but visit the hometown of Izu stone and know the deep connection between Izu and Edo. I realized that Izu stone just built a castle and town in Edo.

Last but not least, I was very grateful to the Kyobashi Library's Regional Archives and Local Museums for responding to my various questions and requests.

In addition, Kaichi Nihonbashi Gakuen provided various information on Ishigaki stone excavated from the site of the Yanagihara embankment.

Thank you very much for taking this opportunity. Thank you very much.

<Main Reference Book>

・Edo Archeological Study Group "Edo Tsukijo and Izuishi" Kikkawa Hirobunkan, 2015

・Itoko Kitahara's "Edo Castle Creation - Urban Infrastructure was built in this way" Chikuma Shobo, 2012

・Sachiko Hagiwara, "The whole picture of Edo Castle - Secrets of the Big World castle" Sakura-sha, 2017

・Yoshio Kanno's "The Story of Ishigaki of the Three Great Castles Enjoyed with Engraved Stones" New People Oraisha, 2011

・Kazuo Nonaka, "History by Things 12 History Series 12 Edo Castle talked by Ishigaki" Taiseisha, 2007

・Shoji Nishimoto, "Tokyo's Street Corner Geology," East Press, 2020

<Main Reference Materials>

・"Repair work of Jobanbashi-Dismantling survey results and restoration method-(Jobanbashi repair work 2nd site tour material)" Chiyoda-ku, 2016

・Chuo-ku Board of Education Edited "Yanagihara embankment site in Chuo-ku, Tokyo" Nihonbashi Jogakukan, Chuo-ku Board of Education, 2013 

・Chuo-ku educators' association edition "Matsudaira Echizen Moriyashiki Ruins Site, Chuo-ku, Tokyo" Wine Corporation, Chuo-ku educators' association, 2010

・Marunouchi 1-40 Archeological Site Investigation Committee "1-chome Marunouchi, Chiyoda-ku, Tokyo", Japan National Railway Seijun Corporation, 1-40 Archeological Site Investigation Committee, Marunouchi 1-40 Archeological Sites Investigation Committee, 1998 

This is "Izu-Oshima Island floating in the sea fog" taken from the coast of Inatori. The sun rose from the horizon of the Sagami-nada Sea, and it was a very fantastic sight. During the Edo period, the daimyo who quarryed here may have seen the same scenery and longed for Edo.