For inquiries regarding water supply, please contact the Water Works Bureau Customer Service Center.
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Telephone: 045-847-6262 Fax: 045-848-4281
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Chronological table
Last Updated April 3, 2024
History-The History of Yokohama City and Modern Water Supply-
| Year | A matter |
|---|---|
| 1859 (Ansei 6) | Yokohama Port Opening |
| 1887 (Meiji 20) | Completed Japan's first modern water supply in Yokohama (Mitsui Intake Plant, Nogeyama Water Purification Plant) October 17 Water supply started |
| 1889 (Meiji 22) | Birth of Yokohama City (April 1) |
| 1890 (Meiji 23) | Establishment of water supply regulations |
| 1897 (Meiji 30) | Start of water intake from the Doshi River |
| 1901 (Meiji 34)~ 1915 (Taisho 4) | Completion of the first to second expansion work (Nogeyama water purification plant expansion, Kawai / Nishiya water purification plant, Abalone intake plant, Aoyama sinking pond) |
| 1916 (Taisho 5) | Purchased approximately 2,780 ha of forest in Michishi Village from Yamanashi Prefecture and started management of water source forests. |
| 1923 (Taisho 12) | Great Kanto Earthquake |
| 1937 (Showa 12)~ 1941 (Showa 16) | Completion of Phase 1 and Phase 2 of expansion (Nishiya water purification plant expansion, Aoyama sinking pond expansion, abalone intake remodeling) |
| 1942 (Showa 17) | Population over 1 million |
| 1945 (Showa 20) | End of the Pacific War |
| 1947 (Showa 22) | Completed Sagamiko |
| 1954 (Showa 29)~ 1965 (Showa 40) | 4th to 6th expansion work (increased Nishiya water purification plant, Sagamihara Seiden Pond, Tsurugamine / Kosuzume Purifiction Plant, Samukawa water intake facility) |
| 1959 (Showa 34) | Yokohama Port 100 Years |
| 1965 (Showa 40) | Lake Tsukui completed |
| 1968 (Showa 43) | Population over 2 million |
| 1971 (Showa 46)~ 1980 (Showa 55) | Completion of the 7th to 8th expansion work (Konandai and other reservoirs) completed: |
| 1978 (Showa 53) | Lake Tanzawa completed |
| 1986 (Showa 61) | Population over 3 million |
| 1987 (Showa 62) | 100th anniversary of modern water supply |
| 2001 (Heisei 13) | Lake Miyagase completed |
| 2003 (Heisei 15) | Launched "Hamako Doshi" |
| 2004 (Heisei 16) | Concluded an agreement on friendship and exchange with Michishi Village, Yamanashi Prefecture |
| 2009 (Heisei 21) | Establishment of "Non-Profit Organization Doshi Water Source Forest Volunteer Association" |
| 2009 (Heisei 21) | 150th anniversary of the opening of Yokohama Port |
| 2014 (Heisei 26) | Tsurugamine Water Purification Plant Abolished Completed Kawai Purification Plant (Cerarocca) Completed construction of the large loop line |
| 2015 (Heisei 27) | 100th anniversary of the establishment of Nishiya Water Purification Plant |
| 2015 (Heisei 27) | 50th Anniversary of Kosuzume Purifiction Plant |
| 2016 (Heisei 28) | Doshi Water Source Forest 100 Years |
| 2017 (Heisei 29) | 130 years of modern water supply |
Inquiries to this page
Public Relations Division, Water Works Bureau Business Promotion Department
Telephone: 045-671-3084
Telephone: 045-671-3084
Fax: 045-212-1169
Email address: su-suidokoho@city.yokohama.lg.jp
Page ID: 925-590-363
