| 1950 |
The group was established when it began its City Gas service in 1950. |
| 1950-12 |
Founded as Yazu Gas Co., Ltd. |
| 1956-02 |
Changed its name to Tokai Gas Co., Ltd. |
| 1959-05 |
Established Shin-Kō Petroleum Gas Co., Ltd. for the purpose of selling liquefied petroleum gas. |
| 1963-01 |
Started selling liquefied petroleum gas by absorbing and merging Shin-Kō Petroleum Gas Co., Ltd. |
| 1966-12 |
Constructed an LP gas coastal base with a storage capacity of 1,580 t at Oigawa Port. |
| 1966-12 |
Separated the existing city gas division and established Tokai Urban Gas Co., Ltd. |
| 1967-06 |
Established Tokai Gas Transport Co., Ltd. to make the tank truck transport division independent. |
| 1969-04 |
Established and operated the nation's first 'delivery center.' The first step in the information and communication business. |
| 1972-11 |
Established Tokai City Service Co., Ltd., built Memorial Plaza Buke Tokai, and expanded into wedding venue operation business in eastern Shizuoka Prefecture. |
| 1977-03 |
Established Yazu Cable Vision Co., Ltd. (now TOKAI Communications Co., Ltd.). |
| 1977-10 |
Merged Yazu Shipyard Co., Ltd. into Tokai Gas Transport Co., Ltd. and changed the name to Tokai Shipbuilding Transport Co., Ltd. |
| 1978-05 |
Changed the name of Yazu Cable Vision Co., Ltd. to Big Tokai Co., Ltd. (now TOKAI Communications Co., Ltd.). |
| 1979-01 |
Opened Tokai Gas Tokyo Branch (now TOKAI Tokyo Headquarters) in Tsukiji, Chuo-ku, Tokyo: started business in the Kanto region and opened offices nationwide. |
| 1979-11 |
Tokai Gas Co., Ltd. (now TOKAI Co., Ltd.) listed its shares on the Second Section of the Nagoya Stock Exchange. |
| 1981-09 |
Tokai Gas Co., Ltd. (now TOKAI Co., Ltd.) was promoted to the First Section of the Nagoya Stock Exchange. |
| 1984-10 |
Entered the security business and expanded services nationwide. |
| 1985-08 |
Operation of the TOKAI Information Center (now TOKAI Communications' First Data Center) commenced. |
| 1987-03 |
Tokai Gas Co., Ltd. (now TOKAI Co., Ltd.) listed its shares on the First Section of the Tokyo Stock Exchange. |
| 1987-10 |
Tokai Gas Co., Ltd. changed its company name to The Tokai Co., Ltd. (commonly known as TOKAI). |
| 1988-09 |
Capital participation in Tokushin Cable Network Co., Ltd. and commencement of a CATV business in Numazu City, Shizuoka Prefecture. |
| 1990-04 |
Nishi Tokushin Cable Network Co., Ltd. started a CATV business in Yaizu City and Fujieda City, Shizuoka Prefecture. |
| 1993-04 |
Completion of the TOKAI headquarters building. |
| 1996-06 |
Entered the internet business. |
| 1998-03 |
Tokai Highway Network Co., Ltd. obtained a license for a Class 1 telecommunications service. |
| 1998-04 |
Capital participation in Ichihara Community Network Television Co., Ltd. and commencement of a CATV business in Ichihara City, Chiba Prefecture. |
| 1999-06 |
Established A.I.C. Co., Ltd. (now Atsugi Isehara Cable Network Co., Ltd.) and started a CATV business in Atsugi City, Kanagawa Prefecture in October of the same year. |
| 1999-08 |
Tokai City Service Co., Ltd. acquired Nichi-Kou Kaikan Co., Ltd. and entered the wedding venue and related operations business in front of Shizuoka Station under the name Buke Tokai Shizuoka. |
| 2000-04 |
Bick Tokai Co., Ltd. merged with Tokai Highway Network Co., Ltd. |
| 2001-01 |
Established Tokai Broadband Communications Co., Ltd. in the Kanto region to oversee CATV operations and conduct ADSL services. |
| 2001-03 |
Commenced ADSL internet services. |
| 2002-04 |
Tokai City Service Co., Ltd. merged with Tokushin Cable Network Co., Ltd. |
| 2002-06 |
Bick Tokai Co., Ltd. listed its shares on the JASDAQ market. |
| 2002-10 |
Tokai City Service Co., Ltd. merged with Nishi Tokushin Cable Network Co., Ltd. and Numazu Television Association Co., Ltd. |
| 2002-12 |
Established Buke Tokai Co., Ltd. |
| 2003-04 |
Tokai City Service Co., Ltd. merged with Tokai Broadband Communications Co., Ltd., and Buke Tokai Co., Ltd. took over the operation of wedding venues and related businesses. |
| 2003-04 |
Invested in East Communications Co., Ltd. and launched a CATV business in Chiba City, Chiba Prefecture. |
| 2005-10 |
Merged Tokai Broadband Communications Co., Ltd. into Big Tokai Co., Ltd. |
| 2006-08 |
Agreed to a strategic business alliance with SoftBank Group and entered the mobile business. |
| 2006-12 |
Established Gotemba Cable Television Co., Ltd. and launched a CATV business in Gotemba City, Shizuoka Prefecture. |
| 2007-11 |
Entered the Aqua business (returnable method). |
| 2008-04 |
The first Aqua plant, 'Aqua Yatsuizuka Plant', commenced production. |
| 2008-04 |
Big Tokai Co., Ltd.'s second data center began operation. |
| 2009-01 |
Established Tokai City Service Co., Ltd. to operate a wedding event venue within the Shizuoka Station Front Konya Town redevelopment building, known as 'Aoi Tower'. |
| 2009-12 |
Big Tokai Co., Ltd. invested in LCV Co., Ltd. and Kurashiki Cable Television Co., Ltd., and launched CATV businesses in Nagano Prefecture (e.g., Suwa City) and Okayama Prefecture (e.g., Kurashiki City). |
| 2010-04 |
Aoi Tower opened, and Tokai City Service Co., Ltd. began operating the wedding event venue 'Grandier Buke Tokai'. |
| 2010-11 |
Announced the management integration of Tokai Co., Ltd. and Big Tokai Co., Ltd. |
| 2010-11 |
Big Tokai Co., Ltd. invested in Dream Wave Shizuoka Co., Ltd. (now Tokochannel Shizuoka Co., Ltd.) and launched a CATV business in Shizuoka City, Shizuoka Prefecture. |
| 2011-03 |
Expanded the Aqua business nationwide (one-way method). |
| 2011-04-01 |
It became a holding company on its sixtieth anniversary on April 1, 2011. |
| 2011-04 |
Established the joint holding company Tokai Holdings Co., Ltd. of Tokai Co., Ltd. and Big Tokai Co., Ltd.; Tokai Holdings Co., Ltd. listed on the First Section of the Tokyo Stock Exchange (Tokai Co., Ltd. and Big Tokai Co., Ltd. delisted in March of the same year). |
| 2011-04 |
Entered the nursing care business and operated day services, short stays, and nursing care assisted paid senior homes in Shizuoka City. |
| 2011-10 |
Transferred Tokai Co., Ltd.'s information and communication business to Big Tokai Co., Ltd. via a spin-off, and renamed Big Tokai Co., Ltd. to Tokai Communications Co., Ltd. |
| 2012-04 |
Split off the CATV business from Tokai Communications Co., Ltd. and established Tokai Cable Network Co., Ltd. |
| 2012-04 |
Fully entered the comprehensive remodeling business ('TOKAI WILL Remodeling'). |
| 2012-04 |
Established a local subsidiary in China: Takukai (Shanghai) Trading Co., Ltd. |
| 2012-10 |
Changed the company name of Dream Wave Shizuoka to Toko Channel Shizuoka Co., Ltd. |
| 2012-12 |
Launch of the TOKAI Group-wide comprehensive membership service system "TLC Membership Service" |
| 2013-03 |
Start of production at the second Aqua plant, "Aqua Fuji Mountain Plant" |
| 2013-03 |
TOKAI Communications Co., Ltd. established a joint venture "Yunma Co., Ltd." in Taiwan with Lingqun Computer Co., Ltd. (SYSCOM) |
| 2013-04 |
TOKAI Corporation merged with Shimada Resort Co., Ltd. and Suzuki Trading Co., Ltd., inheriting their businesses |
| 2013-04 |
Operation of the third data center, "Okayama Data Center," by TOKAI Communications Co., Ltd. |
| 2013-10 |
Spin-off of SSC operations from TOKAI Holdings Co., Ltd. to establish TOKAI Management Service Co., Ltd. |
| 2014-04 |
Establishment of the local subsidiary in Myanmar, "TOKAI MYANMAR COMPANY LIMITED" |
| 2014-12 |
Establishment of Energy Line Co., Ltd. to promote delivery efficiency within Shizuoka Prefecture |
| 2015-04 |
Establishment of TOKAI Home Gas Co., Ltd. to further strengthen marketing system |
| 2015-10 |
Started high-voltage power sales through a business alliance with Tokyo Electric Power Company, Inc. |
| 2016-04 |
Commenced low-voltage power sales following the full liberalization of electricity retailing |
| 2017-02 |
Entered the MVNO market for budget SIM/Smartphone services and launched "LIBMO" |
| 2017-07 |
Made Tokyo Bay Network Co., Ltd., a cable TV operator serving Koto and Chuo wards in Tokyo, a consolidated subsidiary |
| 2017-08 |
Opened an Osaka sales office in Okayama Prefecture and expanded into the Chugoku region with LPG retail business |
| 2018-02 |
Made TV Tsumago Co., Ltd., a cable TV operator serving Tsuyama and Katsuoka towns in Okayama Prefecture, a consolidated subsidiary |
| 2018-06 |
Opened a Kyushu sales office in Fukuoka Prefecture and expanded into the Kyushu region with LPG retail business |
| 2018-09 |
A company mainly engaged in online research and its main business is developing survey systems, etc.: (Company) Size: was made a consolidated subsidiary |
| 2019-04 |
Received a city gas business from Gunma Prefecture Shimonita Town and started the business |
| 2019-07 |
Acquired shares of (Company) AMS Brain, a software development and system operation and maintenance company based in Okayama Prefecture, and made it a subsidiary |
| 2019-08 |
Succeeded the city gas business operated by Kaho City, Akita Prefecture, and established Nikaho Gas Co., Ltd. to strengthen cooperation with the city and collaborate with local companies |
| 2019-08 |
Concluded a business alliance agreement with Isesaki Gas Co., Ltd., which operates a city gas business in Isesaki City, Gunma Prefecture |
| 2019-09 |
Acquired shares of Nissan Industry Co., Ltd., which operates a comprehensive construction business in Gifu Prefecture, and made it a subsidiary. Entered civil engineering business |
| 2019-10 |
Established Tokyo Electric Power Energy Partner Co., Ltd. and T&T Energy Co., Ltd., and entered the city gas business in the Chukyo area |
| 2020-03 |
Acquired shares of Sendai CATV Co., Ltd., which provides services in Sendai City and Natori City, Miyagi Prefecture, and made it a subsidiary |
| 2020-04 |
Nikaho Gas Co., Ltd. started a city gas business in Akita Prefecture |
| 2020-06 |
Related companies of Mien Trung Gas Joint Stock Company and V-Gas Petroleum Corporation, which sell LP gas in Vietnam, and entered the LP gas business in Vietnam |
| 2020-08 |
Made Chuo Electric Construction Co., Ltd., which is based in Nagoya City and engaged in electrical work, a consolidated subsidiary. Built a system for major three construction works: air conditioning, sanitation, and electricity, as a comprehensive construction business operator |
| 2020-11 |
Made Inoue Technica Co., Ltd., which develops property management (building maintenance) business mainly in eastern Shizuoka Prefecture, a consolidated subsidiary |
| 2021-04 |
Established a management company, Tokap Venture Capital & Incubation Co., Ltd., for investing in domestic startups |
| 2021-04 |
Made Maruko Poro Kako Co., Ltd., which conducts large-scale repair work based in Toyota City, Aichi Prefecture, a consolidated subsidiary |
| 2021-04 |
Established an operating company for investing in domestic startup companies: Toka Venture Capital & Incubation Co., Ltd. |
| 2021-05 |
Develops system development business such as commissioned development of IT systems, software, smartphone apps, web production, and operation: Query Co., Ltd., was made a consolidated subsidiary |
| 2022-06 |
Made Wood Recycle Co., Ltd., which is based in Gero City, Gifu Prefecture, and manufactures wood chips and handles intermediate treatment of industrial and general waste, a consolidated subsidiary |
| 2022-09 |
Made Okinawa Cable Network Co., Ltd., which provides services around Naha City, Okinawa Prefecture, a consolidated subsidiary |
| 2022-10 |
Specialized in developing solutions for the logistics industry and expanding business nationwide: J Support Co., Ltd., was made a consolidated subsidiary |
| 2023-04 |
Started providing the water supply type water purifier |
| 2023-07 |
Participated in the initial public offering of REPOWER ENERGY DEVELOPMENT CORPORATION, which operates hydroelectric power generation business in the Philippines, and invested in the company (minority stake) |
| 2024-01 |
The company primarily focuses on system outsourcing development and application development for medical institutions: U.I.S. Co., Ltd. was consolidated as a subsidiary. |
| 2024-02 |
Acquired additional shares of REPOWER ENERGY DEVELOPMENT CORPORATION and became an associate under the equity method. |
| 2024-04 |
Based in Chigasaki City, Kanagawa Prefecture, supplying LP gas mainly in the Shonan and central Kanagawa areas: Fuji Pro Co., Ltd. was consolidated as a subsidiary. |
| 2024-04 |
Established a joint venture with PT Sisnet Mitra Sejahtera in Indonesia and launched cloud service-related business for the Indonesian market. |
| 2024-12 |
Proposes, designs, builds, and maintains IT infrastructure systems specialized in the metropolitan area: G & F Co., Ltd. was consolidated as a subsidiary. |
| 2026-04 |
Operating an LP gas business based in Kawazu Town, Gamō District, Shizuoka Prefecture: Nagata Gas Co., Ltd. was consolidated as a subsidiary. |
