Sanwa Kizai Co., Ltd.

Sanwa Kizai Co., Ltd. (三和機材株式会社) is a Japanese company headquartered in the Konan district of Minato-ku, Tokyo, whose business is organized around two divisions: a trading (shosha) division dealing in piping, plumbing, HVAC and housing-equipment materials, and an engineering division that designs, installs and maintains building services. Its stated mission is to circulate and supply the "energy of water and air" through buildings, drawing an analogy between building services and the blood and oxygen that sustain human life. The company traces its origins to 1939, when Yukie Kaneko — grandfather of the current president — founded Kaneko Shoten in Yokohama to sell iron pipe, fittings, valves and machine tools. After wartime suspension, the business was re-established in 1953 as Tokiwa Shokai Co., Ltd. in Azabu, Tokyo, and in 1968 it was renamed and reorganized as Sanwa Kizai Co., Ltd. Growth followed through the opening of a Yokohama sales office in 1977, a capital increase and expansion into general housing-equipment sales in 1981, and the creation of a building-services engineer network in 1982. Today Sanwa Kizai operates as a specialized distributor and contractor serving construction and building-maintenance customers. Its materials division handles steel pipe, lined steel pipe, stainless and copper pipe, plastic and polyethylene pipe, joints and fittings, valves and automatic valves, expansion and vibration-isolation joints, drainage fittings, flow meters, supports, tools and pumps, sourced from major Japanese manufacturers. Its engineering division covers design, construction and maintenance of building services, including renewal and renovation work. The company also maintains a supplier alliance called "Sanwa Souchukai" with key manufacturers and suppliers to channel information, new products and technical service. Sanwa Kizai is privately held and sits under Sanwa Kizai Holdings Co., Ltd., which shares the same Tokyo address. Its president is Ryutaro Kaneko, with Yoshiteru Kaneko as chairman. Affiliates include ST Co., Ltd., an electrical-equipment contractor, and the company has a business tie-up with Sekisui Kogyo Co., Ltd. It is a member of industry bodies such as the Tokyo Pipe-and-Plumbing Materials Commercial Cooperative and the Kanagawa Pipe-and-Plumbing Materials Association, and banks with Yokohama Bank, Mizuho Bank, Resona Bank, MUFG Bank and the Japan Finance Corporation. Recent corporate news includes the completion of a new head-office building, Shinagawa Konan Terrace, in 2025 and the renewal of its Yokohama branch.

Sanwa Kizai's history begins in 1939 (Showa 14), when Yukie Kaneko — grandfather of the current president — founded Kaneko Shoten in Yokohama to sell iron pipe, fittings, valves and machine tools. In 1945, as World War II intensified and the proprietor was called up, the business suspended operations. It was re-established in 1953 (Showa 28) as Tokiwa Shokai Co., Ltd. in Azabu, Minato-ku, Tokyo. In 1968 (Showa 43) the company changed its name and reorganized as Sanwa Kizai Co., Ltd. — the founding date the company still cites for its incorporation. In 1977 (Showa 52) it opened a Yokohama sales office, aiming to improve service under the principle of "sincere commerce," and moved its head office from Azabu to Shinagawa, where it remains today. In 1981 (Showa 56) it increased capital to 10 million yen to expand, and began selling piping/plumbing materials and housing equipment generally. In 1982 (Showa 57) it established a building-services engineer network, the Keihin network, extending its reach into building-services engineering. Over the following decades the company developed its dual structure: a materials trading division supplying piping, plumbing, HVAC and housing-equipment products from major Japanese manufacturers, and an engineering division designing, installing and maintaining building services, including renewal and renovation of aging buildings. It also formed the "Sanwa Souchukai," an alliance with key manufacturers and suppliers to deliver information, new products and advanced technical service. Corporate developments include the establishment of Sanwa Kizai Holdings Co., Ltd., which now sits above the operating company at the same Tokyo address, and the affiliation of ST Co., Ltd., an electrical-equipment contractor. The company has a business tie-up with Sekisui Kogyo Co., Ltd. In 2025 it completed a new head-office building, Shinagawa Konan Terrace, in Konan, Minato-ku, and in 2026 completed renewal work at its Yokohama branch. Leadership has remained within the Kaneko family: Ryutaro Kaneko serves as representative director and president, with Yoshiaki Kaneko as chairman.

• 2026

  Yokohama Branch renewal work completed; 2026 entrance ceremony held.

• 2025

  New head-office building, Shinagawa Konan Terrace, completed.

• 2024

  Third-party opinion provided on Yokohama Bank's positive impact finance for Sanwa Kizai Holdings.

• 2023

  Corporate website renewed.

• 1982

  Building-services engineer network (Keihin) established.

• 1981

  Capital increased to 10 million yen; began general sales of piping/plumbing materials and housing equipment.

• 1977

  Yokohama sales office opened; head office moved from Azabu to Shinagawa.

• 1968

  Company renamed and reorganized as Sanwa Kizai Co., Ltd.

• 1953

  Tokiwa Shokai Co., Ltd. established in Azabu, Minato-ku, Tokyo.

• 1945

  Business suspended due to intensification of World War II and the proprietor's call-up.

• 1939

  Yukie Kaneko founds Kaneko Shoten in Yokohama to sell iron pipe, fittings, valves and machine tools.

Specialized Japanese distributor and engineering contractor for building water, air and sanitary services, positioning itself as a total-support partner for construction and building-maintenance customers under a customer-first philosophy.

• Steel pipe (Nippon Steel, JFE Steel)

• PVC-lined steel pipe

• Hot-water and drainage lined steel pipe

• Stainless steel pipe and processed stainless pipe

• Copper pipe and refrigerant-coated copper pipe

• PVC pipe and fire-resistant two-layer pipe

• Spiral duct

• Water-supply, drainage, housing-type, stainless and welded joints

• Flanges

• Cross-linked polyethylene and polybutene pipe

• Valves and automatic valves

• Expansion and vibration-isolation joints

• Drainage fittings and flow meters

• Supports, tools and pumps

• Building-services design, construction and maintenance

1. 1三和機材株式会社 公式サイトsanwa-kizai.co.jp
2. 2会社案内 | 三和機材株式会社sanwa-kizai.co.jp
3. 3取扱商品一覧 | 三和機材株式会社sanwa-kizai.co.jp
4. 4Sanwa Kizai Co., Ltd. (Japan) - Wikidatawikidata.org