K&O Energy Group Corporation

1931 (S6): Established the natural gas business under the name Daikichi Natural Gas Co., Ltd.

Established natural gas business under the name Otaki Natural Gas Co., Ltd.

1935 (S10): Established subsidiary Chiba Natural Gas Co., Ltd., and expanded into urban gas supply business centered on Daikichi Town and Mohara City.

Established subsidiary Chiba Natural Gas Co., Ltd. and expanded city gas supply business centered on Otaki Town and Mohara City

Mohara Mining Office (Chiba Prefecture, Mohara City) expanded from Otaki Town, Chiba Prefecture to Mohara City in 1935

Our group expanded from Otaki Town, Chiba Prefecture to Morihara City.

1937 (S12): Established subsidiary Natural Gas Chemical Industry Co., Ltd., and entered the iodine business.

Established subsidiary Natural Gas Chemical Industry Co., Ltd. and entered the iodine business

Starch method iodine production facility (Chiba Prefecture, Otaki Town) began operation in June 1938

Started iodine production operations using the starch method.

The starch method iodine production facility (Ōtaki Town, Chiba Prefecture) ceased operations in September 1944.

Iodine production using the starch method was halted due to poor production efficiency.

1949 (S24): Listed shares on the Tokyo Stock Exchange.

Listed shares on the Tokyo Stock Exchange.

1956 (S31): Established Daiten Gas Sales Co., Ltd. as a subsidiary of Daikichi Natural Gas Co., Ltd., primarily for gas supply and sales.

Established Ōten Gas Sales Co., Ltd. as a subsidiary of Ōtaki Natural Gas Co., Ltd., primarily for gas supply and sales.

The Tamagawa Mining Office (Yokohama City, Kanagawa Prefecture) began operations in 1956, operating one gas well on site to produce and sell compressed gas.

Pursued large-scale natural gas development since 1956.

The Tamagawa Mining Office began operations, had one gas well on site, and manufactured and sold compressed gas.

1957 (S32): Began supplying gas as a chemical industry raw material to Toyo High-Pressure Industry Co., Ltd.'s Chiba plant (now Mitsui Chemicals, Inc. Mohara Branch), and from 1956 (S31) pursued large-scale natural gas development.

Started supplying gas as a chemical industry raw material to Toyo High-Pressure Industry Co., Ltd.'s Chiba plant (now Mitsui Chemicals, Ltd. Morihara Branch). In line with this, large-scale natural gas development began in 1956 (S31): Ōtaki Natural Gas Co., Ltd. was renamed Kanto Natural Gas Development Co., Ltd., and Ōten Gas Sales Co., Ltd. was renamed Ōtaki Natural Gas Co., Ltd.

Started supplying gas as a chemical industry raw material to the Chiba plant of Toyo High-Pressure Industry Co., Ltd. (now Mitsui Chemicals Co., Ltd. Morihara Branch).

Changed the company name of Otaki Natural Gas Co., Ltd. to Kanto Natural Gas Development Co., Ltd., and changed the company name of Daiten Gas Sales Co., Ltd. to Otaki Natural Gas Co., Ltd.

The Tamagawa Mining Office (Yokohama City, Kanagawa Prefecture) closed in 1959.

Closed the Tamagawa Mining Office.

1960 (S35): Began selling LP gas (liquefied petroleum gas).

Commenced sales of LP gas (liquefied petroleum gas).

1961 (S36): Started supplying city gas to Ichihara City

Started supplying city gas to Ichihara City.

In 1961, the Tatsumidai Branch Office (Ichihara City, Chiba Prefecture) began gas supply to the Tatsumidai housing complex in Ichihara Town, initiating gas supply to the Fusa area within Chiba Prefecture.

Started supplying city gas to Ichihara City. Began gas supply to Ichihara Town Tatsumidai Housing Complex (now Ichihara City) and started gas supply to the Bō area within Chiba Prefecture.

1968 (S43): Began supplying city gas to Hamano area of Chiba City and Yachiyo City

Commenced city gas supply to the Hamano area of Chiba City and Yachiyo City.

1970 (S45): Established subsidiary Otaki Sangyo Co., Ltd.

Established subsidiary Ōtaki Sangyo Co., Ltd.

1971 (S46): Began supplying city gas to Hodate and Doki districts of Chiba City

Started city gas supply to the Hodana and Doki districts of Chiba City.

1973 (S48): Completed the Chiba Line (from Mohara City, Chiba Prefecture to Chiba City, Chiba Prefecture), extending 33 km.

Completed the Chiba Line (Morihara City to Chiba City, Chiba Prefecture), extending 33 km.

Completed the Chiba Line (from Morihara City, Chiba Prefecture to Chiba City, Chiba Prefecture, 33 km).

1974 (S49): Entered the construction industry.

Entered the construction industry.

1976 (S51): Established Kanto Construction Co., Ltd. as a subsidiary and transferred part of its construction and related operations.

Established subsidiary Kanto Construction Co., Ltd. and transferred part of its construction and related operations.

1978 (S53): Customer count exceeded 50,000

Customer count surpassed 50,000.

1982 (S57): Introduced ethylene off-gas as a new gas source

1984 (S59): Changed listing designation to First Section of the Tokyo Stock Exchange.

Changed listing designation to First Section of the Tokyo Stock Exchange.

1985 (S60): Established subsidiary KNG America, Inc., conducting oil and gas development operations in the United States.

Established subsidiary KNG America, Inc. to conduct oil and gas development operations in the United States.

1989 (H1): Completed the Shin-Yaotsu Line (from Mohara City, Chiba Prefecture to Yaotsu City, Chiba Prefecture), extending 68 km.

Completed the New Yachiyo Line (Morihara City to Yachiyo City, Chiba Prefecture), extending 68 km.

1991 (H3): Introduced industrial LNG (liquefied natural gas) as a new gas source

1992 (H4): Changed company name from Otaki Natural Gas Co., Ltd. to Otaki Gas Co., Ltd.; customer count exceeded 100,000

1995 (H7): Acquired town gas business from Nanto Town (now Nanto City) and began supplying city gas to the town

1996 (H8): Listed shares on the Second Section of the Tokyo Stock Exchange

2003 (H15): Customer count exceeded 150,000

2006 (H18): Completed the Suekesa Coastal Line (from Suekesa City, Chiba Prefecture to Ichihara City, Chiba Prefecture), extending 14 km. Introduced BOG (Boil-Off Gas) as a new gas source and obtained ISO14001 certification at all facilities.

Completed the Sodegaura Coastal Line (Sodegaura City to Ichihara City, Chiba Prefecture), extending 14 km. Introduced BOG (boil-off gas) as a new gas source: obtained ISO14001 certification at all facilities.

Completed the Sodegaura Coastal Line (from Sodegaura City, Chiba Prefecture to Ichihara City, Chiba Prefecture, 14 km).

Introduced BOG (Boil-Off Gas) as a new gas source.

ISO 14001 certification obtained at all facilities.

2007 (H19): Made Japan Natural Gas Co., Ltd. a subsidiary.

Japanese Natural Gas Co., Ltd. was made a subsidiary.

2008 (H20): Customer count exceeded 160,000

Established K&O Energy Group Co., Ltd. (Kanto Natural Gas Development Co., Ltd. and Otaki Gas Co., Ltd. merged management). Listed on the First Section of the Tokyo Stock Exchange (now Prime Market).

Established K&O Energy Group Co., Ltd. (Kanto Natural Gas Development Co., Ltd. and Ota-ki Gas Co., Ltd. merged management).

Listed shares on the First Section of the Tokyo Stock Exchange (currently listed on the Prime Market).

2017 (H29): Customer count exceeded 170,000

Moved K&O Energy Group Co., Ltd.'s headquarters from Chiyoda-ku, Tokyo to Morihara City, Chiba Prefecture.

2018 (H30): Absorbed Kanto Construction Co., Ltd. through merger.

2018 (H30): Absorbed Otaki Sangyo Co., Ltd.; began retail electricity business

Kanto Construction Co., Ltd. was absorbed and merged.

Made WELMA Co., Ltd. a subsidiary.

2021 (R3): Established subsidiary KNG Farm Co., Ltd., entering the plant factory business.

Established subsidiary KNG Farm Co., Ltd. and entered the plant factory business.

Established subsidiary KNG Farm Co., Ltd. and entered the plant factory business.

2022 (R4): Consolidated the group's natural gas business through a corporate restructuring with Japan Natural Gas Co., Ltd. (now K&O Iodine Co., Ltd.).

2022 (R4): Completion of Nanohana Pipeline: (JERA Futtsu LNG Terminal to Enzan Power Station, 31 km extension)

Through a business reorganization with Japanese Natural Gas Co., Ltd. (now K&O Iodine Co., Ltd.), the group's natural gas business was consolidated.

Consolidated the group's natural gas business through a corporate restructuring with Japan Natural Gas Co., Ltd. (now K&O Youso Co., Ltd.).

2023 (R5): Subsidiary Nippon Kōhatsu Co., Ltd. absorbed subsidiary Jōsō Boring Co., Ltd. and changed its name to KNG Well Tech Co., Ltd.

Subsidiary Japan Mining Development Co., Ltd. absorbed subsidiary Kōsō Boring Co., Ltd. and changed its name to KNG Well Tech Co., Ltd.