Toho Gas
A major Japanese city-gas and energy supplier serving the Tokai region from its base in Nagoya.
Last updated August 31, 2026
AI crawler reads
No AI crawler has read this profile since Oct 28, 2026.
Overview
Toho Gas Co., Ltd. is a Japanese energy utility headquartered in Nagoya, Aichi Prefecture. Its principal business is the supply and sale of city gas across the Tokai region, with particular strength in the Chukyo metropolitan area and surrounding parts of Aichi, Gifu, and Mie prefectures. The company is one of the principal regional gas utilities in Japan and is commonly associated with Nagoya’s established corporate economy. The company’s origins date to 1922, when the gas business associated with the newly formed Toho Electric Power organization was separated and Toho Gas acquired the business of Nagoya Gas. This created the foundation for a regional gas network centered on Nagoya. During its early expansion, Toho Gas also acquired the business of the Saibu Gas Group in Fukuoka in 1927. That northern Kyushu operation was subsequently transferred to Saibu Gas Corporation in 1930, allowing Toho Gas to concentrate more clearly on its core regional territory. Toho Gas has historically operated within Japan’s regulated and infrastructure-intensive utility sector. Its activities are tied to gas procurement, network operations, customer service, maintenance, and the sale of energy to residential, commercial, and industrial customers. In addition to city gas, the company’s business scope includes natural-gas-related activities and electricity retailing, reflecting the broader diversification of Japanese gas utilities following changes in the country’s energy market and retail structure. The company expanded its regional base through corporate integration. In April 2003, Toho Gas merged with Gōdō Gas, Gifu Gas Corporation, and Ōgaki Gas. These combinations strengthened its presence in Gifu and adjacent areas and consolidated gas-related operations under a larger regional organization. Its affiliated businesses include customer-service, gas-technology, liquefied-gas, and regional gas companies, including Toho Gas Customer Service Company, Toho Gas Techno Company, Toho Liquefied Gas Company, and Mizushima Gas Company in Kurashiki, Okayama Prefecture. Toho Gas is listed on the Tokyo Stock Exchange under ticker 9533.T. Its competitive identity is that of a regional, infrastructure-based energy provider rather than a national consumer brand. The company’s strategic importance comes from the reliability of its supply networks, its long-term relationships with households and businesses, and its role in the energy system of central Japan. The core brand remains closely linked to city gas, while electricity and related energy services broaden the company’s customer offering.
History
Toho Gas traces its corporate history to the reorganization of electric and gas businesses in Japan during the early twentieth century. In 1922, following the formation of Toho Electric Power through the merger of Kansai Denki and Kyushu Dentō Tetsudō, the gas business was separated from the electric-power structure. Toho Gas was established on June 26 of that year through the acquisition of the business of Nagoya Gas. The transaction provided the company with an operating base in Nagoya and established the regional focus that continues to characterize the brand. The company’s first period of development involved both consolidation and geographic expansion. In March 1927, Toho Gas acquired the business of the Saibu Gas Group in Fukuoka, extending its activities beyond the Nagoya area. This northern Kyushu operation was not retained permanently: in December 1930, the gas business in northern Kyushu was transferred to Saibu Gas Corporation. The transfer helped define Toho Gas as a company primarily focused on the central Japanese market rather than as a nationwide gas operator. Over subsequent decades, Toho Gas developed as a major regional city-gas utility serving the Tokai region. Its principal service area came to include Aichi, Gifu, and Mie prefectures, with especially strong ties to the Chukyo metropolitan area. The company’s activities required the development and maintenance of distribution infrastructure, customer-support operations, gas procurement and handling capabilities, and specialized technical functions. Through this infrastructure role, Toho Gas became one of the established companies associated with Nagoya’s economic and civic life. A significant later stage of regional consolidation occurred in April 2003, when Toho Gas merged with Gōdō Gas, Gifu Gas Corporation, and Ōgaki Gas. The combination expanded and integrated the company’s position in Gifu and surrounding markets, reinforcing its role as a large regional supplier. Toho Gas also maintained or developed affiliated companies covering customer service, technical operations, liquefied gas, and other related activities. These affiliates support the operational capabilities required by a modern utility and extend the company’s presence into selected markets outside its principal Nagoya-area territory. The structure of the Japanese energy market has continued to evolve, and Toho Gas has broadened its commercial scope beyond conventional city-gas sales. The company now identifies with a wider energy offering that includes natural-gas-related activities and electricity retailing. This diversification allows it to serve customers through more than one energy product while retaining gas distribution as its defining business. Its core market remains regional and infrastructure-led: households, businesses, and industrial users in central Japan depend on the company’s supply and service systems. Toho Gas is publicly listed in Japan under ticker 9533.T. The company’s present identity combines the historical role of a Nagoya-centered city-gas utility with the wider responsibilities of a regional energy provider. Its long-term development has therefore been shaped by three recurring themes: the consolidation of gas businesses, concentration on the Tokai region, and gradual expansion into adjacent energy and technical services.
- 2003
Regional gas-company merger
[1]Toho Gas merged with Gōdō Gas, Gifu Gas Corporation, and Ōgaki Gas, strengthening its regional position in Gifu and neighboring markets.
- 1930
Northern Kyushu business transferred
[1]Toho Gas transferred its northern Kyushu gas business to Saibu Gas Corporation, returning its principal geographic emphasis to central Japan.
- 1927
Expansion into Fukuoka
[1]The company acquired the business of the Saibu Gas Group in Fukuoka, temporarily extending its operations into northern Kyushu.
- 1922
Formation of Toho Gas
[1]Toho Gas was established on June 26, 1922, through the acquisition of the business of Nagoya Gas after the gas business was separated from the Toho Electric Power structure.
Products and positioning
Regional infrastructure-based energy supplier serving central Japan, with city gas as its core offering and electricity and related energy services as complementary businesses.
Gas utility
City gas
City gas is Toho Gas’s principal offering. The company supplies gas through regional distribution infrastructure to residential, commercial, and industrial customers, with its core service area concentrated in Aichi, Gifu, and Mie prefectures and the wider Chukyo metropolitan area.
Energy supply
Natural gas
Natural-gas-related activities complement the company’s city-gas business. They support the supply and sale of gas energy to customers and form part of Toho Gas’s broader role as a regional energy provider.
Electricity retail
Retail electricity
Toho Gas also retails electricity in Japan. Electricity broadens the company’s household and business energy proposition beyond gas and reflects the move by regional gas utilities toward multi-energy customer relationships.
Gas products
Liquefied gas
Liquefied-gas activities are represented within the Toho Gas group through an affiliated company. This business complements the company’s networked city-gas operations and supports gas-related services in markets or applications where liquefied gas is appropriate.
Sources2 sources
Cite this profile: Cite the canonical profile. /brand-wiki/toho-gas · Editorial policy · How profiles are compiled