Official

In the construction of a castle town in Edo, the townspeople's land is basically composed of a square block between 60 square Kyoma. This is thought to have adopted the form of town split developed in Kyoto.

After the Great Fire of the Meiryaku era, there were no major changes in the block or road on the west side along the main street, but the following two changes were observed:

1)　The depth of the Machiya style was reduced by a maximum of one to 19.

2)　A "back street" between Kyoma 8 has been newly established.

The city planning that was implemented at this time remains in the map of 1873, and can be seen in Nihonbashi and Ginza. "Omote-dori" here refers to Chuo-dori (Ginza-dori), and at first, a meeting place was set up in the middle as a fire protection area. One block is a square, and is said to be a square between 60 Kyoma and 60 Kyoma.

Looking at the city planning of the Edo period, the Edo period and Kyoma are mixed and there is a risk of misunderstanding, so we calculated with great care.

[Preconditions for calculation]

1.　In the 1873 gu ticket map (Owarimachi 2-chome = current Ginza 6-chome), which is published in the Chuo-ku history map collection, I tried to estimate the size (tsubo number) of the site of the town mansion. The gu ticket map is like a copy of the current real estate registry, and as shown in the attached figure, the name of the owner, the address of the real estate, the number of tsubo, and the real estate value (both) = the sale price (estimated) are written.

Since the number of tsubo is a half-hearted figure, I guessed that it was a value converted between Kyoto and Edo. Therefore, in order to confirm the size of one block between Kyoma 60 x 60, it is necessary to first convert the number of tsubo between Edo and to the Kyoma value.

2.　The large stores in Nihonbashi and Ginza are said to be 4 frontages and about 20 depths (Kyoma) at the time of the Keicho era, so we basically adopted this number. If you look at the Kidai Shoran, there are cases where it is between 4 and 4.6 depending on the store, so the basics are 20 depths. However, since the map of the gu ticket in 1873 was after the great fire of the Meiryaku era, it was set to a depth of 19.

3.　The dimensions and the number of tsubo between Kyoma and Edo are as follows, so we have now converted the numbers between Kyoma and Edo.

　　Kyoma 1 = 1910mm, Edo 1 = 1760mm
　   Kyoma 1 tsubo = 3.64 m2, Edoma 1 tsubo = 3.3 m2

4.　The width of the back street was calculated assuming that there were 8 between Kyoto.

[Analysis Results]

The total number of tsubo of Machiya in the Owaricho 2-chome block was 3,728 tsubo in Kyoma conversion, so assuming that it is a square, it will be between one side = 61.06. Since it was an era when we did not have accurate surveying technology, we found that the value between 60 x 60 is almost correct.

Based on the map of the gu ticket, the size of the site was calculated for each house and the dimensions of the vertical and horizontal were calculated.

*　There is a site where the number of tsubo is not written.

Since some uncertain numbers had to be used, the vertical and horizontal dimensions obtained by integrating were between 63.76 and 65.72. The above figures calculated from the total number of tsubo were determined to be the range of error.

The road width of Harumi-dori St., where the Ginza 4-chome block is in contact, was widened in line with the Expo scheduled to be held in 1940 (1940), but before that, as in other blocks, it should be between 60 and 60 between Kyoma. I've confirmed it.

If one side of the square is calculated based on the estimation of the number of tsubo, Kyoma 63.4.

The value obtained by calculating the frontage from the number of tsubo of the town mansion is between 60 and 63.2.

As expected, it was confirmed that it was within the range of error between 1 block = 60 inter-Kino x 60 as expected.

Reference Book:

1)　About the standard scale of the Edo period Tsuyoshi Fujimoto

2)　Regional differences in land ownership in Edo Town People's Land Jun Nakato

3)　Chuo-ku History Chart (Kyobashi edition)

4)　Research on the influence of Edo's urban structure in the construction of Ginza brick streets in the early Meiji era Tetsushi Okamoto, Urban Architecture Research Institute