Thirtyma moat trace (the place with pink arrows)
From Ginza, take Harumi-dori St. toward Tsukiji and just before Showa-dori.
The old map below was published in Kaei 2 (1849) (the place with a black arrow).
It is indigo on the left and right, and the one shown is Horikawa. The location of the two arrows is almost the same. When you walk around here, the road is booming.
It was connected from the Kyobashi River to the Shiodome River. In 1612, at the order of Tokugawa shogunate in Keicho 17 (1612), the Saikoku Daimyo excavated mainly for the purpose of boating. This name was given because the moat width was thirty (about 55 meters). In Bunsei 11 (1828), it was narrowed to nineteen. In 1952, the pile of rubble after Pacific War was reclaimed for processing.
