Gomunoinaki Co., Ltd.

Gomunoinaki Co., Ltd. (ゴムノイナキ株式会社) is a Japanese company headquartered in Nagoya, Aichi Prefecture, that specializes in the sale, development, and manufacture of industrial rubber and plastic products. Founded in 1919 as Inaki Shoten and renamed Gomunoinaki in 1927, it is one of the earliest Japanese companies to adopt a katakana corporate name. The company describes itself as a "global technical trading firm equipped with manufacturer functions" — combining trading, research and development, and in-house production to serve customers across the automotive, housing equipment, home appliance, office automation, and medical sectors. Gomunoinaki operates an extensive domestic and international network. Domestically, it maintains 15 to 16 bases and five affiliated companies; overseas, it has 18 bases across 10 countries, including 11 production sites and 7 sales offices. Its core strengths are proposal-based sales, technical development (analysis, compounding design, product design, CAD/CAE evaluation), and quality assurance. The company supplies approximately 28,000 product types and 12.5 million rubber and plastic parts daily to a wide range of industries. Quality and environmental management are central to its operations. Gomunoinaki has held ISO 9001 certification since 2001 and ISO 14001 certification since 2002, covering its headquarters and major domestic offices. The company celebrated its 100th anniversary in 2019 and continues to promote sustainability under the slogan "coexistence with nature." It is also active in sports sponsorship, serving as an official supporter of the Chunichi Dragons professional baseball team and, from December 1, 2025, holding naming rights for the "Gomunoinaki-mae" secondary station name at Minami-Ōtaka Station near its Ōtaka headquarters.

Gomunoinaki traces its origins to 1919, when it was founded as Inaki Shoten (イナキ商店). In 1927, the company changed its name to Gomunoinaki, a name derived from the characters for rubber (護謨) and the founder's name (稲木). This made it one of the first companies in Japan to adopt a katakana corporate name. The company initially engaged in the trading of industrial rubber products and gradually expanded into plastics and related materials. Over the decades, Gomunoinaki evolved from a pure trading company into a hybrid organization that combines trading with research and development and manufacturing functions. It established technical research laboratories and affiliated manufacturing companies, enabling it to offer integrated solutions from material development to product design and quality assurance. This transformation positioned the company as a "global technical trading firm equipped with manufacturer functions." By the 2000s, Gomunoinaki had built a substantial global network. Domestically, it operates 15 to 16 bases and five affiliated companies. Overseas, it has 18 bases in 10 countries, including 11 production sites and 7 sales offices. The company achieved ISO 9001 certification in April 2001 and ISO 14001 certification in March 2002, formalizing its commitment to quality and environmental management. In 2019, Gomunoinaki celebrated its 100th anniversary, reflecting on its long history and its basic philosophy: "Love truth, respect courtesy, and respond to trust." The company continues to supply approximately 28,000 product types and 12.5 million rubber and plastic parts daily to industries such as automotive, housing equipment, home appliances, OA, and medical. In December 2025, it further raised its public profile by acquiring the secondary station name rights at Minami-Ōtaka Station, renaming it "Gomunoinaki-mae" in a naming rights deal.

• 2025

  Acquired secondary station name rights at Minami-Ōtaka Station, effective December 1, 2025.

• 2019

  Celebrated 100th anniversary.

• 2002

  Obtained ISO 14001 certification (March 13, 2002).

• 2001

  Obtained ISO 9001 certification (April 20, 2001).

• 1927

  Renamed to Gomunoinaki; one of Japan's first katakana corporate names.

• 1919

  Founded as Inaki Shoten.

A global technical trading company equipped with manufacturer functions, delivering high-quality rubber and plastic products through integrated development, production, and quality assurance.

• Industrial rubber parts

  Rubber components for automotive, housing, appliance, OA, and medical applications.

• Plastic parts

  Plastic components for various industrial uses.

1. 1ゴムノイナキ株式会社 公式サイトinaki.co.jp
2. 2ゴムノイナキについて｜企業情報｜ゴムノイナキ株式会社inaki.co.jp
3. 3ISO認証取得｜企業情報｜ゴムノイナキ株式会社inaki.co.jp
4. 4企業情報｜ゴムノイナキ株式会社inaki.co.jp
5. 5ゴムノイナキ - Wikipediaja.wikipedia.org
6. 6Gomunoinaki - Wikidatawikidata.org