Chuo-ku Tourism Association correspondent blog

Hello. This is a new correspondent, Hanes.
In the middle of October, maples and maples of street trees in Chuo-ku will see if they will turn red.
I started checking on my way to work.


(Edo Momiji-dori: Nihonbashi 1-chome 18-Nihonbashi 3-chome 15)


(Kojunsha Street)

Apparently, it seems that the autumn leaves are still far away.
According to "Chuo-ku Street Trees managed by Chuo-ku" on the website of Chuo-ku.
There are 36 maple trees in the Kyobashi area, 47 in the Nihonbashi area, and 0 in the Tsukishima area.
It seems that 254 trees are planted in the Kyobashi area, 127 trees in the Nihonbashi area, and 103 maple trees in the Tsukishima area.
Because of the beautiful autumn leaves, they are street trees in all cities nationwide.

In such Chuo-ku, there is another thing related to "Momiji".
That's Momijigawa.
In Chuo-ku, there are still existing rivers such as the Sumida River and the Nihonbashi River, while many rivers have disappeared due to landfills.
The Kaede River is also one of the rivers that disappeared.



As you can see on this information board, the Kaedegawa used to be a Dansho Bridge.
This is a senior correspondent Gimney ☆Mr. Cricket is also introducing you. (For more information, see the related article.)


(Current Dansho Bridge. It was replaced in 1926 and is located slightly north of the conventional Dansho Bridge. )

This bridge is an unnamed bridge in the Kanei era, Shoo era, and Meiryaku era.
In the figure of 1700 (Genroku 13), it is described as "Togoehashi" (Togoshi Bridge) of unknown origin, and it became a bullsho bridge derived from Shimada Dansho Shosuke, who later had mansion in Hatchobori.
The street network was improved through the municipal reform project in 1913 (Daisho 2), and a new bullsho bridge was erected upstream of the bridge, and at the same time the old bullsho bridge was renamed the former bullsho bridge and survived. However, it has been abandoned due to land readjustment of the earthquake reconstruction project.

However, this bridge is Japan's first domestic bridge manufactured at the Akabane Plant of the Ministry of Construction at the request of the Tokyo Government.
In May 1929, Tokyo City decided to relocate and preserve the Hachiman Bridge at Tomioka 1-chome in May 1929.



So when I went to Tomioka Hachimangu Shrine, I crossed the old Dansho Bridge.



In fact, this bridge is also the oldest existing iron bridge in Tokyo and the second oldest in Japan!
By the way, the oldest in Japan is Ryokuchi Nishibashi (formerly Shinsaibashi) in Osaka City, Osaka Prefecture.
These are introduced in the Japan Bridge Construction Association, "100-Year Bridge: Reliable Technologies for the Next Generation" (p. 17).

It is also characterized by a pin with chrysanthemum emblems reflecting the national prestige, unique to a bridge built for the first time in a government-run factory.



It is a valuable bridge in the history of modern bridges as a transitional iron bridge from the cast iron bridge to the iron bridge.
In 1989, he received the Japan Society of Civil Engineers' Honor Award from the Civil Engineers of the United States for the Wipple-type truss bridge based on the patents of American Squire-Wipple.



Old Dansho Bridge, a symbol of Civilization and enlightenment...
I was able to learn about its deep history in a place where I went a little further.
One bridge is very interesting! In Chuo-ku, which is full of such a history, Mainichi is a series of discoveries!



[Related Articles]
Dimini ☆Mr. Cricket, "Walking the ruins of Kaedegawa (1)"
/archive/2018/06/post-5299.html
Dimini ☆Mr. Cricket, "Walking the ruins of Kaedegawa (2)"
/archive/2018/06/post-5303.html

[References]
Chuo-ku, Board of Education, Social Affairs Division, Cultural Property Section, Chuo-ku Cultural Properties Survey Report No. 5, Bridge and Hashizume Plaza in Chuo-ku- Modern Bridge Survey-" (Chuo-ku Board of Education, Social Division, Cultural Property Section, Chuo-ku, Tokyo, 1998).

[Reference Website]
Japan Bridge Construction Association "100 Years Bridge: Reliable Technologies for the Next Generation"
http://www.jasbc.or.jp/panfuretto/panfu_100year_201505.pdf
National Diet Library "National Diet Library Digital Collection" Edo Kiri-ezu Tsukiji Hachimachi Hori Nihonbashi Minami-ezu
http://dl.ndl.go.jp/info:ndljp/pid/1286660?tocOpened=1
Agency for Cultural Affairs "Cultural Heritage Online"
http://bunka.nii.ac.jp/heritages/detail/121364