Sumida River Walk (4) Toshima - Iwabuchi: Dec.10. 2011














I took the 4th and last part of my Sumida River walk. It was from Toshima in Kita ward (near Oji) to Iwabuchi, where Sumida River separates from Arakawa River. (See part 1, 2, and 3)

Toshima is about 10 minutes walk from JR Oji station. The river curves sharply here. Large apartments are built.


Highways run along Sumida River. Helicopters flied over the town because a SDF (Self Defense Force) base is in Oji area.

I found a monument of an old (early 20th century) wall. The area was repeatedly damaged by flood disasters and many river banks were built. The old wall is still used in some parts of Sumida River.

Construction works were carried out in many places to rebuild the riverbanks. Some works began after the Great East Japan Earthquake in March.


I walked a few kilometers on the bank before arriving at the separate point (of Arakawa River and Sumida River). I saw Sumida River in my left and Arakawa River in the right.


I met many cyclers and walkers in the road. Golf courses, baseball fields, cycling roads and other facilities for outdoor activities are developed in the riverfield.

The river(s) was wide at the separate point. Water flows slowly. It is about 21 kilometers from the sea.


Arakawa River originally flowed into Sumida River. The current Arakawa (lower part) was developed artificially in the early 20th century to prevent flood disasters.

A huge water gate was built to control the water volume flows into Sumida River.  A board shows information about the gate and water control. It also provides the bird-eye pictures of the river at normal time and heavy rain days.

I dropped in a museum where they showed the information about Arakawa River and disaster prevention. It was impressive that Tokyo’s major rivers including Sumida and Arakawa flow higher places than surrounding residential areas. They became raised bed rivers because of the soil carried by the rivers themselves.