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Plan 28 Rivers
Last updated on March 16, 2021.
In Yokohama City, the rainwater infiltration capacity of river basins has been significantly reduced due to the progress of urbanization. To address this situation, the River Basin Coordination Division has drafted a safe river improvement plan for the 28 major rivers to which the city will carry out renovation work, and is also working on a conservation rehabilitation plan for the river environment.
| Number | Name of water system | Name of River | Grade | Extension | Basin Area | Remarks |
|---|---|---|---|---|---|---|
| 1 | Tsurumi River | Kurosuda River | Applied mutatis mutandis | 2,820(m) | 3.41(km2) | - |
| 2 | Nara River | Applied mutatis mutandis | 1,920(m) | 6.51(km2) | - | |
| 3 | Iwakawa | Applied mutatis mutandis | 1,838(m) | 4.36(km2) | - | |
| 4 | Umeda River | First class | 2,230(m) | 3.86(km2) | H15.4 Delegation from the prefecture | |
| 5 | Dai-Kumakawa | First class | 2,360(m) | 4.57(km2) | S62.9 Take over to the prefecture | |
| 6 | Toriyama River | First class | 2,090(m) | 4.47(km2) | H16.4 Delegation from the prefecture | |
| 7 | Sunada River | First class | 1,740(m) | 3.48(km2) | H15.4 Delegation from the prefecture | |
| 8 | Hayabuchi River | First class | 7,991(m) | 27.80(km2) | S62.9 Take over to the prefecture | |
| 9 | Irie River | Irie River | Applied mutatis mutandis | 1,480(m) | 6.40(km2) | - |
| 10 | Waterfall River | Waterfall River | Applied mutatis mutandis | 840(m) | 9.94(km2) | - |
| 11 | Katabira River | Katabira River | Second grade | 6,170(m) | 23.50(km2) | - |
| 12 | Naka-Horikawa | Second grade | 1,310(m) | 4.42(km2) | - | |
| 13 | Now Igawa | Second grade | 4,740(m) | 7.60(km2) | - | |
| 14 | Ookagawa | Ookagawa | Applied mutatis mutandis | 3,280(m) | 4.04(km2) | - |
| 15 | Hinokawa | Applied mutatis mutandis | 890(m) | 5.42(km2) | - | |
| 16 | Sakaigawa | Kashio River | Second grade | 435(m) | - | - |
| 17 | Nagata Hirato Tanikawa | Second grade | 4,740(m) | 15.54(km2) | H23.4 Delegation from the prefecture | |
| 18 | Kawakami River | Applied mutatis mutandis | 1,428(m) | 4.24(km2) | - | |
| 19 | Akuwa River | Second grade | 5,440(m) | 13.89(km2) | - | |
| 20 | Name Segawa | Second grade | 2,210(m) | 3.14(km2) | - | |
| 21 | Maioka River | Second grade | 1,640(m) | 4.29(km2) | Watersheds include mutatis mutandis | |
| 22 | Maioka River | Applied mutatis mutandis | 450(m) | 1.93(km2) | - | |
| 23 | Itachi River | Second grade | 6,170(m) | 13.88(km2) | - | |
| 24 | Aizawa River | Applied mutatis mutandis | 2,340(m) | 4.30(km2) | - | |
| 25 | Izumi River | Second grade | 9,420(m) | 11.46(km2) | - | |
| 26 | Udagawa | Second grade | 3,520(m) | 11.86(km2) | H24.4 Delegation from the prefecture | |
| 27 | Miyakawa | Miyakawa | Second grade | 2,040(m) | 7.98(km2) | - |
| 28 | Ookagawa | Ookagawa Branch Waterway | Second grade | 3,637(m) | - | S56.4 Take over to the prefecture |
| - | Total 7 water systems 28 rivers | Total 85,169 (m) | - | - | ||
Inquiries to this page
River Basin Coordination Division, Sewerage and Rivers Bureau River Department
Phone: 045-671-4215
Phone: 045-671-4215
Fax: 045-651-0715
E-Mail address [email protected]
Page ID: 967-358-560
