Corporate History

Founders Hidejiro Naito Kanekichi Hayashi

Founded in 1920, Rinnai & Co. first manufactured and sold pressurized oil stoves. By the late 1920s it had already established itself as a trustworthy manufacturer of gas tabletop stoves, gas ovens, gas heaters, and gas hot-water units.

Corporate Development

1920The company is incorporated as Rinnai & Co. by founders Hidejiro Naito and Kanekichi Hayashi.
1923Deliveries of gas appliances, including tabletop stoves, ranges, gas ovens, and water heaters, to Japanese gas utilities nationwide, as well as exports, begin.
1938Manufacturing of aircraft parts takes place with the factory coming under military supervision.
1940The company changes its name to "Rinnai Aircraft Parts Manufacturing."
1947Production of gas and kerosene appliances resumes at the rebuilt Head Office factory.
1950The company is reorganized as a joint stock company and renamed Rinnai Seisakusho.
1954The Tokyo Sales Office (now the Kanto Branch) opens.
1956The Osaka Sales Office (now the Kansai Branch) opens.
1957The Aichi Factory (now the Chubu Branch) opens.
The company forms a technology tie-up with German company Schwank GmbH to manufacture and sell gas infrared burners and to develop heaters and cooking appliances that use them.
1960The lnba Factory (later the Asahi Factory) opens.
1961The Fukuoka Sales Office (now the Kyushu Branch) opens.
1963The Sendai Satelite Office (now the Tohoku Branch) and the Sapporo Satelite Office (now the Hokkaido Sales Office) open.
1964The Oguchi Factory opens.
1967The Technology Development Center opens.
1968The Niigata Satelite Office (now the Niigata Sales Office) opens.
1969The Nagoya Sales Office (now the Chubu Branch) opens.
1970Rinnai Taiwan Corporation is established.
Business partnership with Yanagisawa Manufacturing Co., Ltd.
Investment in Yamauchi Yoko (now RT Engineering Co., Ltd.)
1971The name changes to Rinnai Corporation.
RB Controls Co., Ltd., and Rinnai Australia Pty. Ltd. are established.
1972The company receives the Ota Award from the Japan Gas Association for its gas high-speed convection oven.
1973Rinnai (Malaysia) Sdn. Bhd. is established.
1974Rinnai Korea Corporation and Rinnai America Corporation are established.
1975Rinnai New Zealand Ltd. and Equipamentos NGK-Rinnai Ltda. are established.
1976Rinnai Industries (UK), Ltd. is established.
1979The company is listed on the Second Section of the Nagoya Stock Exchange.
Rinnai Precision Co., Ltd. is established and the Seto Factory opens.
1981Japan Ceramics Co., Ltd. is established.
Business partnership with lsomura Kiki (now Rinnai Technica Co., Ltd.)
1982The company is listed on the Second Section of the Tokyo Stock Exchange.
1983The Hiroshima Satelite Office (now the Chugoku Sales Office) opens.
The company is listed on the First Section of the Tokyo Stock Exchange and Nagoya Stock Exchange.
1984The Takamatsu Satelite Office (now the Shikoku Sales Office) opens.
1985The company receives the Ota Prize from Japan Gas Association for development of a water boiler equipped with a safety mechanism to prevent incomplete combustion.
1986The company receives the Excellent Technology Prize from the Japan Gas Association as well as the first Chunichi Industrial Technology Award for the development of an ultracompact water heater.
1988P.T. Rinnai Indonesia is established.
The Hong Kong Representative Office opens.
1990The Tsukuba Research Center (now Tsukuba Training Center) opens.
Rinnai (Thailand) Co., Ltd. and Noto Tech Co., Ltd. are established.
1991Rinnai Singapore Pte. Ltd. is established.
1993Shanghai Rinnai Co., Ltd. is established.
1994The new Headquarters building is completed.
1995The company receives ISO 9001 certification for all domestic factories.
1996Rinnai Holdings (Pacific) Pte Ltd. is established in Singapore.
The company receives Testing Facility Acceptance from International Approval Services (IAS).
1998Rinnai Hong Kong Ltd. and Rinnai Vietnam Co., Ltd. are established.
1999Business partnership with Gastar Co., Ltd.
RG Co., Ltd. is established.
2000The company receives the Ministry of International Trade and Industry's Energy Conservation Award for its highly efficient condensing gas water heaters.
2001The company receives the Technology Prize from the Japan Gas Association for its highly efficient condensing gas water heaters.
2003The company receives ISO 14001 certification for all domestic factories.
The company receives the Energy Conservation Grand Prize (Chairman's Prize) from the Energy Conservation Center for its glass-top stoves with inner flame burners.
2004Guangzhou Rinnai Gas and Electric Appliance Co., Ltd. is established.
2005The company receives the Technology Prize from the Japan Gas Association for its Eco-Jozu condensing dual water heater/space heaters.
2006RBS Thermo Technology Co., Ltd. is established.
The company receives the Technology Prize from the Japan Gas Association for its bathroom heater/dryer with mist sauna function.
2008Rinnai Italia S.r.l. is established, and the Integrated Logistics Center opens.
Rinnai gas tankless water heater receives the Super Nova Star Award (an energy-saving award) from the Alliance to Save Energy in the United States.
2009Rinnai Canada Holdings Ltd. is established.
2010The Production and Technology Development Center opens.
2011The West Japan Customer Center opens.
2013TheAkatsuki Factory opens.
The Rinnai Parts Center opens following business integration.
2014The company receives the Ministry of Economy, Trade and Industry's Energy Conservation Award for ECO ONE, a hybrid water heater with heating system.
The company's hybrid water heater with heating system for Hokkaido receives the Kitaguni Energy Conservation and New Energy Grand Prize.
2015Brivis Climate Systems Pty Ltd in Australia is acquired.
The Dubai Representative Office opens.
2016Gastar Co., Ltd. becomes a consolidated subsidiary.
2018The East Japan Logistics Center (now Atsugi Logistics Center) opens.
2019Our brand promise is established, and the Rinnai logo is updated.
2021Industrias MASS SA de CV in Mexico is acquired.

Company Overview

NameRinnai Corporation
Head office2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya, 454-0802
Tel. +81-52-361-8211

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IncorporatedSeptember 1, 1920


EstablishedSeptember 2, 1950
PresidentHiroyasu Naito
Paid-in capital¥6,484,410 thousand
Main businessDevelopment, manufacture, and sales of comprehensive heating products
Number of group companies46 companies

Group Companies

Stock listingTokyo and Nagoya Stock Exchanges
Securities Code: 5947
Market Segment: Tokyo Prime, Nagoya Premier
Industry: Metal Products
Accounting periodApril 1 to March 31
Number of employees11,150 [Consolidated]
3,587 [Rinnai Corporation]
(As of March 31, 2023)
Sales and profit [Consolidated] (April 1, 2022 - March 31, 2023)
  • Net sales


    ¥425.2 billion

  • Operating income


    ¥  41.4 billion

  • Ordinary income


    ¥  44.5 billion

  • Net income attributable to owners of the parent company


    ¥  26.0 billion

Rinnai Corporation