Government

National Printing Bureau
Bank of Japan
National Institute of Advanced Industrial Science and Technology
National Institute of Infectious Diseases
Japan Sewage Works Agency
Yokota Air Base
National Maritime Research Institute
Urban Renaissance Agency
Japan Railway Construction, Transport and Technology Agency
Japan Automobile Research Institute

Hokkaido

Water Service Department, Tomakomai-shi
Waterworks Department, Hakodate-shi
Waterworks Department, Shibetu-shi
and 5 more organizations

Aomori

Waterworks Section, Misawa-shi
Waterworks Section, .Mutsu-shi
Waterworks Section, Hirosaki-shi
Waterworks Office, Towada-shi
and 6 more organizations

Akita

Waterworks Bureau, Akita-shi
Business Section, Oga-shi
and 4 more organizations 

Iwate

Waterworks Office, Ichinoseki-shi　　
Waterworks Office, Ofunato-shi　
and 5 more organizations

Yamagata

Waterworks Department, Yamagata-shi
Waterworks Department, Tsuruoka-shi
Waterworks Section, Shinjou-shi
Waterworks Section, Nagai-shi
Mogami River Central Waterworks Office
and 1 more organization

Miyagi

Waterworks Bureau, Sendai-shi
Waterworks Office, Tagajou-shi
and 4 more organizations

Fukushima

Waterworks Department, Fukushima-shi
Waterworks Office, Shirakawa-shi
Waterworks Office, Souma-shi
Waterworks Department, Shirakawa-shi
and 11 more organization

Niigata

Waterworks Bureau, Niigata-shi
Gas and Waterworks Bureau, Joetsu-shi
Gas and Waterworks Bureau, Ojiya-shi
and 9 more organizations

Ibaragi

Waterworks Department, Mito-shi
Water Supply and Drainage Department, Yuki-shi
Waterworks Department, Hitachinaka-shi
Waterworks Section, Kasama-shi
and 20 more organizations

Tochigi

Waterworks Bureau, Utunomiya-shi
Waterworks Bureau, Sano-shi
Waterworks Department, Tochigi-shi
Waterworks Section, Kanuma-shi
Waterworks Section, Oyama-shi
Waterworks Section, Ashikaga-shi
Waterworks Section, Moka-shi
Waterworks Section, Yaita-shi
and 18 more organizations

Gunma

Waterworks Bureau, Maebashi-shi
Waterworks Bureau, Takasaki-shi
Waterworks Bureau, Kiryu-shi
Waterworks Section, Isesaki-shi
and 12 more organizations

Saitama

Waterworks Bureau, Ageo-shi
Waterworks Department, Kawaguchi-shi
Waterworks Department, Kasukabe-shi
Waterworks Department, Kumagaya-shi
Waterworks Department, Iruma-shi
Waterworks Department, Souka-shi
Waterworks Department, Fukaya-shi
Waterworks Department, Hanno-shi
Water Supply and Drainage Department, Tokorozawa-shi
Waterworks Section, Yashio-shi
Waterworks Section, Satte-shi
Waterworks Section, Kazo-shi
Waterworks Section, Asaka-shi
Waterworks Section, Hanyu-shi
Waterworks Section, Honjo-shi
Waterworks Section, Sayama-shi
Waterworks Department, Niiza-shi
and 10 more organizations

Chiba

Waterworks Bureau, Chiba-ken
KujuKuri Wide Area Waterworks Business Organization
Miyoshi Waterworks Business Organization
Nagatogawa Waterworks Business Organization
Waterworks Bureau, Chiba-shi
Waterworks Bureau, Yachiyo-shi
Business Bureau, Narashino-shi
Waterworks Department, Narita-shi
Waterworks Department, Kimitsu-shi
Waterworks Department, Noda-shi
Waterworks Section, Katsuura-shi
Waterworks Section, Abiko-shi
Cleaning Office, Kashiwa-shi
Waterworks Department, Sakura-shi
Waterworks Department, kamogawa-shi
and 8 more organizations

Tokyo

Bureau of Waterworks Tokyo Metropolitan Government
Bureau of Sewerage Tokyo Metropolitan Government
Waterworks Department, Musashino-city
and 9 more organizations

Kanagawa

Waterworks Bureau, Yokohama-shi
Waterworks Bureau, Yokosuka-shi
and 4 more organizations

Yamanashi

Waterworks Bureau, Kofu-shi
Waterworks Section, Nirasaki-shi
Waterworks Section, Tsuru-shi
Waterworks Section, Fujiyoshida-shi
and 11 more organizations

Toyama

Waterworks Bureau, Takaoka-shi
Waterworks Bureau, Himi-shi
Waterworks Department, Tonami-shi
Waterworks Section, Uotsu-shi
and 4 more organizations

Ishikawa

Environmental Bureau, Ishikawa-ken
Business Bureau, Kanazawa-shi
Waterworks Section Business Bureau, Komatsu-shi
Public Works Bureau, Wajima-shi
Waterworks Section, Nanao-shi
Waterworks Section, Kaga-shi
Waterworks Section, Suzu-shi
and 11 more organization

Fukui

Farmland Section Agricultural Administration Department, Fukui-ken
Waterworks Department Business Bureau, Fukui-shi
Waterworks Department, Sabae-shi
Waterworks Department, Kohama-shi
Waterworks Section, Ono-shi
Waterworks Section, Katsuyama-shi
and 4 more organizations

Nagano

Kamiina Wide Area Waterworks Business Organization
Waterworks Bureau, Nagano-shi
Waterworks Bureau, Ueda-shi
Waterworks Bureau, Suwa-shi
Waterworks Department, Okaya-shi
Waterworks Section, Iiyama-shi
Waterworks Section, Susaka-shi
Waterworks Section, Iida-shi
Waterworks Section, Komane-shi
Matsumoto-shi
and 10 more organizations

Gifu

Waterworks Department, Gifu-shi
Waterworks Department, Seki-shi
Waterworks Department, Ogaki-shi
Waterworks Department, Mino-shi

Shizuoka

Oigawa Waterworks Office, Business Bureau
Fujigagwa Waterworks Office, Shizuoka-ken
Waterworks Bureau, Shizuoka-shi
Waterworks Bureau, Yaizu-shi
Waterworks Department, Fuji-shi
Waterworks Department, Shimada-shi
Waterworks Department, Numazu-shi
Waterworks Department, Susono-shi
Waterworks Department, Gotenba-shi
Waterworks Department, Kakegawa-shi
and 8 more organizations

Aichi

Waterworks Bureau, Nagoya-shi
Municipal hospital, Nagoya-shi
Waterworks Bureau, Toyota-shi
Waterworks Department, Komaki-shi
Waterworks Department, Toyokawa-shi
Waterworks Department, Okazaki-shi
Waterworks Department, Inasawa-shi
Waterworks Department, Kariya-shi
Waterworks Section, Inuyama-shi
Waterworks Bureau, Toyohashi-shi
Waterworks Bureau, Anjo-shi
and 8 more organizations

Mie

Municipal Enterprise Department, Kuwana-shi
Waterworks Bureau, Tsu-shi
Waterworks Bureau, Kameyama-shi

Shiga

Nara

Water Supply and Drainage Bureau, Nara-shi

KYOTO

Osaka

Waterworks Bureau, Sakai-shi
 

Hyogo

OKAYAMA

Hiroshima

Yamaguchi

Waterworks Bureau, Iwakuni-shi

Shimane

Waterworks Bureau, Hamada-shi

Fukuoka

Waterworks Bureau, Fukuoka-shi
Waterworks Bureau, Toyomae-shi

Saga

Waterworks Department, Saga-shi

Nagasaki

Oita

Waterworks Bureau, Beppu-shi
Waterworks Bureau, Oita-shi
other 7 organizations

Kumamoto

Waterworks Bureau, Kumamoto-shi

Kagoshima

Waterworks Section, Wadomari-cho

Okinawa

Waterworks Section, Motobu-cho
Waterworks Section, Chatan-cho
and 8 more organizations