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Rinnai Corporation is a Japanese multinational company specializing in the manufacture of gas appliances. Established on September 1, 1920, by Hidejiro Naito and Kanekichi Hayashi, Rinnai has grown to become a significant player in the home appliance industry. The company's product lineup includes energy-efficient tankless water heaters, home heating appliances, kitchen appliances, and commercial-use equipment like rice cookers, grillers, and fryer. The company is headquartered in Nagoya, Japan, and its shares are listed on the Tokyo Stock Exchange.