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Tour of water purification plants, etc.

Last Updated January 26, 2024

Acceptance of facility tours and reservations

Water Works Bureau accepts tours of water purification plants and other facilities.
The purpose is to deepen the understanding of the water supply business by actually observing the water purification process in which safe and high-quality tap water is produced, the purpose is to deepen the understanding of the water supply business and make the water supply more familiar.
In addition, facility tours of 2024 will start accepting on Thursday, February 1, 2024.

Details of the tour

We will introduce facilities by video, visit the sinking pond and filtration ponds, and simulated sinking experiments. (It varies slightly depending on the water purification plant.)

※About Nishiya water purification plant and Kosuzume Purifiction Plant, we publish introduction video of water purification plant on YouTube.
Please see "Let's study with" Hama Pyeong "" on the public relations video (Water Works Bureau) list page.

Mechanisms of Water Treatment Plant

Please see here for information on the structure of the water purification plant.

Target facilities and tour dates

Target facilities and tour dates
Target facilities Date of visit (excluding public holidays) Number of people accepted
Kawai Purification Plant Monday to Friday

80 elementary school students and up to 2 classes
Up to 50 people

Kosuzume Purifiction Plant Tuesday and Wednesday

70 elementary school students and up to 2 classes
Up to 30 people in general

Aoyama Water Source Office (Aoyama, Midori-ku, Sagamihara City) Monday to Friday Elementary school and up to 40 students

※Holidays and New Year holidays (from December 28 to January 4) are not held. In addition, from the end of April to the beginning of July, classes for elementary school students will be given priority.
※Nishiya water purification plant and water quality inspection room (water quality section) will stop accepting tours during the construction period due to the Nishiya Water Purification Plant Redevelopment Project.
※The Waterworks Memorial Hall was completely closed in 2021 with the Nishiya Water Purification Plant Redevelopment Project.
※Kawai Purification Plant will only be visited by Cerarocca, a membrane filtration facility.
※Please use public transportation to visit the venue.
※Please follow the instructions of the staff in the guide to take pictures.

Tour time

Each facility will be held once a day in the morning and afternoon.

Morning part: About 2 hours from 9:30
Afternoon session: About 2 hours from 1:30

※It takes about an hour tour to Kawai Purification Plant.

Application destination, method

Please contact the Water Works Bureau Customer Service Center by telephone or facsimile.
In the case of telephone, the reception will be made 5 business days after the business day after reception.
For facsimile, please write required items on the fax application form and send it to us. (* Similar to telephone, it will be accepted 5 business days later.)

Water Works Bureau Customer Service Center
Phone number: 045-847 (Hachiyona) -6262
Facsimile: 045-848-4281

※After you have applied, the target facility will contact you separately to confirm your reservation.

Location and Transportation

  • Kawai Purification Plant
    • Location 2555, Kamikawaicho, Asahi-ku, Yokohama-shi
    • Get off at Mitsukyo Station on the Transportation Sotetsu Line
    • About 12 minutes walk from municipal, Sotetsu, Kananaka bus bound for "Wakabadai Chuo" and get off at "Kamekoyama"
    • Get off at Tokaichiba Station on JR.
    • About 8 minutes walk from "Nagatsuta Minami" for 55 municipal bus system "Wakabadai Chuo" and walk about 8 minutes
  • Kosuzume Purifiction Plant
    • Location 2470, Kosuzumecho, Totsuka-ku, Yokohama-shi
    • Transportation JR "Ofuna Station" West Exit of Ofuna Station
    • A 15-minute walk from Koshinzuka bound for "Position Terminal, in front of Matano/Pharmaceutical University".
  • Aoyama Water Source Office
    • Location 3482, Aoyama, Midori-ku, Sagamihara-shi
    • Transportation Get off at Hashimoto Station on the Kananaka Bus bound for Mikagi and get off at Mikagi and walk 30 minutes.

Signboard of "Yokohama Channel Founded Water Supply Canal"

In 1887, Japan's first modern water supply was born in Yokohama.
At the time of its founding, the water transmission route was from Mitsui-mura, Tsukui-gun (now Midori-ku, Sagamihara-shi) at the confluence of the Sagami River and the Doshi River, where the water was taken from Mitsui Village, Tsukui-gun (now Midori-ku, Sagamihara City) to Nogeyama Water Purification Plant (now Nogeyama Reservoir). It was about 44km.
Sagamihara-shi, Yamato-shi, Machida-shi and Yokohama-shi have concluded agreement, and are maintained as green paths and promenades, respectively.
Along the road, a signboard explaining the outline of the water supply facilities in an easy-to-understand manner was set up in 2007 to commemorate the 120th anniversary of the modern water supply. There are 26 locations on the water supply tracks at the time of its founding.
Why don't you think about important water while walking along green paths and promenades on holidays?

Signboard image
Signboard

Image of green paths and promenades
Green paths and promenades

Installation location
Number Location of Signboard Information on installation location The name of the town and village at that time
1 58, Mii, Midori-ku, Sagamihara-shi Boat platform Mitsui Village
2 1130, Kawashiri, Midori-ku, Sagamihara-shi Near Ogura Bridge ※There are closed sections Kawashiri-mura
3 Near 681, Oshima, Midori-ku, Sagamihara-shi Near the village of Sagami River Natural Village and the clear stream ※There are closed sections OShimamura
4 3339, Oshima, Midori-ku, Sagamihara-shi In Keishoen Garden, a welfare center for the elderly OShimamura
5 2074, Tana, Chuo-ku, Sagamihara-shi Jogging course Tana Village
6 44, Kamimizo, Chuo-ku, Sagamihara-shi Yokohama Suido Michi Green Road Kamimizo-mura
7 1102, Taima, Minami-ku, Sagamihara-shi Azamigaya intersection Tohma Village
8 Near 2096, Shimomizo, Minami-ku, Sagamihara-shi At the Doyama Bridge (Doho River) Shimomizo-mura
9 1900, Asamizodai, Minami-ku, Sagamihara-shi Near Joshibi University of Art and Design Shimomizo-mura
10 2-10-28, Futaba, Minami-ku, Sagamihara-shi In Futaba Amusement Park Isobe-mura
11 5-7, Higashirinkan, Minami-ku, Sagamihara-shi Sagamihara Suido Amusement Park Kamitsuruma-mura
12 1454, Shimotsuruma, Yamato-shi In Sakura Promenade Park Shimotsuruma-mura
13 3-1, Tsuruma, Machida-shi In Tsuruma Park Tsuruma-mura
14 4-6, Tsuruma, Machida-shi At the bypass of National Route 246 Tsuruma-mura
15 6-10, Tsuruma, Machida-shi In Tsuruma Triangle Park Tsuruma-mura
16 83, Kawaihoncho, Asahi-ku, Yokohama-shi Bus Stop Fukusen Teramae Shimokawai-mura
17 9, Tsuokacho, Asahi-ku, Yokohama-shi Near Tsuokacho intersection Shimokawai-mura
18 167, Imajukunishicho, Asahi-ku, Yokohama-shi Katabira River Green Road Imajuku-mura
19 2-20, Tsurugamine, Asahi-ku, Yokohama-shi Tsurugamine Park Entrance Kawashima-mura
20 24-3, Nishikawashimacho, Asahi-ku, Yokohama-shi In Nishikawajima Park Kawashima-mura
21 4-5, Higashikawashimacho, Hodogaya-ku, Yokohama-shi In Azumakawa Island Suido Michi Park Kawashima-mura
22 257, Bukkoucho, Hodogaya-ku, Yokohama-shi Bus Stop Bukkoucho Buddhism Village
23 5-1, Kawabecho, Hodogaya-ku, Yokohama-shi Near the intersection in front of Kawabe Park Katabiracho
24 25, Minamisengencho, Nishi-ku, Yokohama-shi In Syaguuji Park Lawn village
25 94, Fujidana 1-chome, Nishi-ku, Yokohama In front of Fujidana "Koban" (police box) Tobecho
26 63-10, Oimatsucho, Nishi-ku, Yokohama-shi In Nogeyama Park Tobecho

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
※Please be careful not to make a mistake.

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For inquiries to this page

Water Works Bureau Water Purification Department Water Purification Section

Phone: 045-671-3544

Phone: 045-671-3544

Fax: 045-212-1158

Email address: su-josui@city.yokohama.jp

Return to the previous page

Page ID: 225-289-735

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