Cosmo KOKI Co., Ltd.

Cosmo KOKI Co., Ltd. (コスモ工機株式会社) is a Japanese company in Tokyo that manufactures water-supply pipe fittings and develops no-water-shutoff (fudansui) construction methods. Its official site states it offers a lineup of more than 3,000 products and describes itself as a leading company in no-water-shutoff methods, supporting water-supply infrastructure. The company was established in 1959 with its head office placed in Shimbashi, Tokyo, and capital of 500,000 yen, and it developed Japan's first no-water-shutoff boring machine, the Cosmo Borer SB-1. It manufactures roughly 3,000 tons of water-supply products annually and operates the Akita Factory as its main manufacturing base, along with a 3D research and development building established in April 2023.

Cosmo KOKI Co., Ltd. was established in 1959 (Showa 34), with its head office placed at 3-15-8 Shimbashi, Tokyo, and capital of 500,000 yen; Fumijiro Wada became president. In the same year it developed Japan's first no-water-shutoff boring machine, the Cosmo Borer SB-1, marking the full-scale start of Japan's no-water-shutoff branching method. In 1960 it carried out Japan's first no-water-shutoff branching work (cast iron pipe 500×150, Yokohama City Waterworks Bureau) and began a nationwide promotional "caravan." In 1962 its products first went overseas, to Iran for an oil plant branch. In 1964 it developed the hot tap method, applying the no-water-shutoff method to oil pipelines, and carried out Japan's first hot tap work (Tachikawa City, Tokyo, US military base). In 1968 it began building a nationwide sales network and opened the Kawaguchi Factory (Saitama Prefecture). In 1969, its 10th anniversary, capital was increased to 15 million yen and Akiji Kato became representative director and president. In 1971 the head office moved to 2-16-1 Shimbashi, Minato-ku, Tokyo (New Shimbashi Building). In 1972 it developed the inserting method and carried out Japan's first inserting work (Insap Plug 500 mm, Suita City Waterworks Department). In 1975 it opened the Shinko Factory (Saitama Prefecture). In 1976 it obtained construction business approval and established China Cosmo Co., Ltd. (head office: Hiroshima Prefecture). In 1977 it opened the Osaka Branch and took a capital stake in Hokko Metal Industry Co., Ltd. (head office: Akita City, Akita Prefecture), which took charge of the casting division as the Akita Casting Factory. Its official site states that it manufactures about 3,000 tons of water-supply products annually, operates the Akita Factory as its main manufacturing base, and established a 3D research and development building within the Akita Factory in April 2023.

Leading company in no-water-shutoff construction methods supporting water-supply infrastructure.

• Cosmo Borer SB-1

• Cosmo Borer CO-2

• Cosmo Borer CO-4

• Cosmo Borer CO-8

• Cosmo Borer CO-12

• Cosmo Valve T type

• Cosmo separation-prevention press ring CM-45

• Tighton Lock CT-45

• Cosmo pipe cutting and grooving machine GC200/300

• Automatic pipe cutting machine CH-77A

• PVC pipe joints such as Mecachiz and Vinylock

• Cosmo separation-prevention press ring CMN

• Cosmo separation-prevention press ring CMT

1. 1コスモ工機株式会社cosmo-koki.co.jp
2. 2沿革｜コスモ工機株式会社cosmo-koki.co.jp
3. 3私たちについて｜コスモ工機株式会社cosmo-koki.co.jp
4. 4未来のインフラを支える 3D研究開発棟｜コスモ工機株式会社cosmo-koki.co.jp
5. 5Cosmo KOKI Co., Ltd. (Japan)wikidata.org