Here’s the Nomikawa 呑川 river in 1948. There are two branches: the lower branch, a horizontal line facing east/west, is labelled “Nomikawa Canal”.

Tokyo 1948 Nomikawa old course

The upper branch, which appears to say “Noini -kawa”, is the original Nomi-kawa. Sometime after 1948, the upper branch of the river was fully diverted and is now covered by walking paths, roads, Kyunomikawa Ryokuchi Park, etc. A school, Tōho Junior High School, is built on land that was once the split between the river and the canal. See map.

Like many former rivers in Tokyo, an abundance of trees takes the place of  water, which makes for a pleasant walk for much of the approximately 2-kilometer former river.

What was once the canal (the lower branch), is now considered the Nomikawa river.

Nomikawa Tokyo old course

Years ago, I crossed the old river late at night as I was walking to Haneda Airport. I could tell something was unusual about this place, but I didn’t realize it used to be a river:

A sign from the former canal, now Nomikawa River:

Nomikawa river sign Ota-ku Tokyo

See #38 in the attached map to see the old river’s course:

Also, at the end of the new river’s course is the Haneda Movable Swing Bridge 羽田可動橋 / 羽田旋回橋(map):

defunct haneda swing bridge

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