For inquiries regarding water supply, please contact the Water Works Bureau Customer Service Center.
Water Works Bureau Customer Service Center
Phone: 045-847-6262 Fax: 045-848-4281
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Chronology
Last update date April 3, 2024
History - Yokohama City and the History of Modern Water Supply
| Year | Matters |
|---|---|
| 1859 (Ansei 6) | Opening of Yokohama |
| 1887 (Meiji 20) | Japan's first modern water supply in Yokohama (Mitsui Intake Plant, Nogeyama Water Purification Plant) Water supply started on October 17 |
| 1889 (Meiji 22) | Yokohama City (April 1) |
| 1890 (Meiji 23) | Establishment of Water Supply Ordinance |
| 1897 (Meiji 30) | Started water intake from the Doshi River |
| 1901 (Meiji 34)~ 1915 (Taisho 4) | 1st to 2nd expansion work completed (Reinforcement of Nogeyama water purification plant, Kawai and Nishiya water purification plant, Abalone water intake plant, Aoyama sinking pond) |
| 1916 (Taisho 5) | Purchased about 2,780 ha of forests in Doshi Village from Yamanashi Prefecture and started management of watershed forests. |
| 1923 (Taisho 12) | Great Kanto Earthquake |
| 1937 (Showa 12)~ 1941 (Showa 16) | Completion of the first and second phases of the third expansion (Enhancement of Nishiya Water Purification Plant, Aoyama Shinden Pond, Remodeling Abalone Water intake) |
| 1942 (Showa 17) | Population of more than one million |
| 1945 (Showa 20) | End of the Pacific War |
| 1947 (Showa 22) | Sagamiko completed |
| 1954 (Showa 29)~ 1965 (Showa 40) | 4th to 6th expansion work (enhancement of Nishiya water purification plant, Sagamihara sinking pond, Tsurugamine / Kosuzume Purifiction Plant, Samukawa intake facility) |
| 1959 (Showa 34) | 100 Years of Yokohama Port Opening |
| 1965 (Showa 40) | Completion of Lake Tsukui |
| 1968 (Showa 43) | Population of more than 2 million |
| 1971 (Showa 46)~ 1980 (Showa 55) | Completed 7th to 8th expansion work (Kojaku, Nishiya water purification plants and water pipes, construction of Konandai and other distribution reservoirs) |
| 1978 (Showa 53) | Completion of Lake Tanzawa |
| 1986 (Showa 61) | Population of more than 3 million |
| 1987 (Showa 62) | 100th anniversary of modern water supply |
| 2001 (Heisei 13) | Lake Miyagase completed |
| 2003 (Heisei 15) | Launched “Hamakotsu” launched |
| 2004 (Heisei 16) | Concluded an agreement on friendship and exchange with Michishi Village, Yamanashi Prefecture |
| 2009 (Heisei 21) | Established "Doshi Water Source Forest Volunteer Association" |
| 2009 (Heisei 21) | 150th Anniversary of Yokohama Port Opening |
| 2014 (Heisei 26) | The Tsurugamine Water Purification Plant Kawai Purification Plant (Cerarocca) completed Completion of the large ring line |
| 2015 (Heisei 27) | The 100th anniversary of Nishiya Water Purification Plant |
| 2015 (Heisei 27) | Kosuzume Purifiction Plant 50th Anniversary |
| 2016 (Heisei 28) | Doshi Water Source Forest 100 Years |
| 2017 (Heisei 29) | 130 years of modern water supply |
For inquiries to this page
Water Works Bureau Business Promotion Department
Phone: 045-671-3084
Phone: 045-671-3084
Fax: 045-212-1169
Email address: su-suidokoho@city.yokohama.jp
Page ID: 925-590-363
