Note: this intersection is located on or near the original location of the old 六郷用水 Rokugo yōsui irrigation system, aka the Rokugo Canal, which lends its name to a Ward within Ota-ku today.
At the southern border of Ota-ku is Rokugōdote Station六郷土手駅, also named for the canal.
This post covers several danchi in the Ōta-ku neighborhoods of Minamikamata, Haginaka, Honhaneda, and Minamirokugō. These neighborhoods center around Nanatsuji 七辻, a 7-way intersection (map), supposedly one of only two in Japan.
Here’s the intersection, cross-referenced to the above map:
A sign notes this is “Japan’s best model intersection” 「日本一ゆずり合いモデル交差点」