July：Introduction of New Gas-VAN interactive observation system completed September：Akita Home Gas Co., Ltd. (now Akita MITSUUROKO Co., Ltd.) established
1991
January：Construction of VIP Ojima Mansion (condominium rental property) completed March：BC-100 computer-linked automated filling system operated by barcode introduced
Construction of VIP Ojima, the Group’s 24th rental property, is completed (January 1991)
1993
April：Mitsuuroko Gas trading name adopted by regional retail companies July：Mitsuuroko Ryutsu trading name adopted by regional distribution companies
1994
Salad Gas Strategy deployed, establishing Salad Gas locations in the following locations September：Hachioji October：Narita
1995
July：Akita-Minami Office (now the Akita Branch) established
1996
April：Safety Salad Co., Ltd. established July：Construction of Karuizawa Employee Recreation Facility completed October：Tianjin Sanrin Steel Vessel Technical Inspection Co., Ltd., an international joint venture for LPG container inspection, established in Tianjin, China
Tianjin Sanrin Steel Vessel Technical Inspection Co., Ltd. established in Tianjin, China (October 1996)
1997
April：Regional service companies established through the merger of regional Mitsuuroko Gas and Mitsuuroko Ryutsu companies May：Tohoku Yoken Co., Ltd. established
July：Construction of 5,000-kl kerosene tank completed at Mitsuuroko Chiba Terminal
Completion of 5,000-kl tank at Mitsuuroko Chiba Terminal (July 10, 1997)
1998
April：Bulk supply system for consumers comes into effect June：Construction of 2,000-kl kerosene tank completed at Mitsuuroko Aomori Terminal October：Gunma-Higashi Office and Mitsuuroko Technology Study Center (Isesaki, Gunma) completed November：Construction of 4,000-kl kerosene tank completed at Mitsuuroko Nagoya Terminal December：Business expands to cover Osaka and Nara with the acquisition of the retail departments for the General Sekiyu and Esso Sekiyu brands
1999
February：Eco Station opened in Hiratsuka, Kanagawa February：Mitsuuroko Technology Study Center in Isesaki, Gunma accredited as a facility for training bulk filling workers
A new filling center in Fukushima was constructed with the aim of improving operational and logistical efficiency (November 1999)
2000
March：Kansai Division opened March：M&D Green Energy Co., Ltd. (now Mitsuuroko Green Energy Co., Ltd.) established May：Yorozuya Salad online store launched November：Home Service Salad launched
2001
February：Mitsuuroko Osaka Technology Study Center in Sakai, Osaka accredited as a facility for training bulk filling workers April：Musashi Energic Center Co., Ltd., a cooperative logistics company in the Musashi area, established October：Construction of Teshio Wind Power Plant of M&D Green Energy Co., Ltd. completed October：Introduction of Eco-MAPS micro-gas turbine LPG high-pressure supply system completed
2002
March：Kanagawa Energic Co., Ltd., a cooperative logistics company in Kanagawa, established March：Ibaraki Energic Co., Ltd., a cooperative logistics company in Ibaraki, established May：Business expands to cover Wakayama with the establishment of Sankyo MITSUUROKO Co., Ltd. June：Construction of Ioka Wind Power Plant of M&D Green Energy Co., Ltd. completed November：Fuchu Eco Station opened in Fuchu
The Ioka Wind Power Plant becomes our second power generation facility, after Teshio Wind Power Plant (June 2002)
2003
February：Construction of San Village Nara, San Village Ashikaga and Highness Motomiya rental properties completed August：Fuji no Takaramono Vanadium 63 Natural Mineral Water launched November：Nakagawa Canal Eco Station opened in Nagoya
New business in the field of lifestyle services begins with sale of Fuji no Takaramono Vanadium 63 Natural Mineral Water (August 2003)
2004
March：Chiba-Kita Eco Station opened in Chiba March：Construction of Urban Fort Yokohama rental property completed April：Mitsuuroko Medium-Term Management Plan formulated April：Eneurge Co., Ltd. established June：Quest Power Co., Ltd. established July：Aqua Plaza Koto opened August：Business expands to cover Hokuriku region with the acquisition of Yonezawa Sangyo Co., Ltd.
2005
March：Kumagaya Eco Station opened in Kumagaya May：Matsumoto MITSUUROKO Co., Ltd. established
2006
February：Headquarters relocated to Sotokanda, Tokyo March：Omiya Eco Station opened in Saitama March：Yokohama Eco Station opened in Yokohama March：Construction of Urban Fort Sumiyoshi completed August：Group participates in L Square Project
2007
February：Construction of Gumihara Wind Power Plant of M&D Green Energy Co., Ltd. completed February：Construction of Hosoya Wind Power Plant of M&D Green Energy Co., Ltd. completed March：Construction of Azuchi Oshima Wind Power Plant of M&D Green Energy Co., Ltd. completed
2009
March：Hamabowl EAS opened
Opening of Hamabowl EAS (March 2009)
2010
March：Construction of Fuji Seisui Lake Yamanaka Factory completed April：Logitri Kanto Co., Ltd. and Logitri Tohoku Co., Ltd. established after consolidating logistics departments May：M&D Green Energy Co., Ltd. enters the retail electricity business after obtaining a license as a Specified-Scale Electricity Utility November：First Ecoice urban retail store opened
Yamanakako Factory of Fuji Seisui begins operation (March 2010)
2011
January：Iwakuni Wood Power, the Group’s first biomass power plant, acquired October：Group adopts a holding company structure through a company split; MITSUUROKO Co., Ltd. becomes Mitsuuroko Group Holdings Co., Ltd.; operation of energy resources, real estate and amusement businesses transferred to subsidiaries New MITSUUROKO Co., Ltd. and Triforce Corporation established
2012
October：Participation in mega solar power business December：Hamabowl reopened after renovation
2013
October：Headquarters relocated to Kyobashi, Tokyo
2014
February：Suigo Itako Solar Power Plant begins operation July：Futtsu Solar Power Plant begins operation October：Service station with attached used car dealership opened December：Carl’s Jr. Japan Inc. established
2015
January：Mitsuuroko Beverage Co., Ltd. (now Mitsuuroko Provisions Co., Ltd.) acquired all shares of Kachimizu Co., Ltd. (now Mitsuuroko Beverage Co., Ltd.) April：Mitsuuroko Corporation Co., Ltd. established April：Logitri Group established after consolidating logistics departments April：Mitsuuroko Beverage Co., Ltd. (now Mitsuuroko Provisions Co., Ltd.) began operating stores and cafeterias in facilities August：Business expands to Shikoku region with the establishment of Kanbara MITSUUROKO Co., Ltd. August：Tsuitamon child safety service launched
2016
March：First Carl’s Jr. restaurant in Japan (Carl’s Jr. Akihabara Restaurant) opened in Akihabara, Tokyo April：Retail electric power business launched (Mitsuuroko Electric) following market liberalization April：Cocostore Retail K.K. was made a subsidiary of Mitsuuroko Beverage Co., Ltd. (now Mitsuuroko Provisions Co., Ltd.) April：Kachimizu Co., Ltd. (now Mitsuuroko Beverage Co., Ltd.) takes over the beverage business of Mitsuuroko Beverage Co., Ltd. (now Mitsuuroko Provisions Co., Ltd.)
2017
April：Mitsuuroko Group Holdings acquires all shares of Sweet Style Co., Ltd. October：Through a company split, operation of energy retail business of MITSUUROKO Co., Ltd. is transferred to Mitsuuroko Vessel Co., Ltd., Mitsuuroko Vessel Tohoku Co., Ltd., Mitsuuroko Vessel Chubu Co., Ltd. and Mitsuuroko Vessel Kansai Co., Ltd. October：First MG store opened in Kiso Sansen Park, Kuwana November：Construction of L’Abeille Azabu Juban, a mixed-use property encompassing commercial and residential facilities, was completed
2018
April：Memorandum of understanding signed with a Taiwanese subsidiary May：Launched Japan’s first large-scale feasibility study to improve efficiency of LPG delivery operations in Nagoya May：Mitsuuroko Group acquires all shares of Sanyuu Corp. July：Investment made into Revolator Co., Ltd., Japan’s largest recreational vehicle rental company August：Azabujuban Mont-Thabor flagship store reopened after remodeling August：Contract finalized to establish joint venture Japan Enagic Co., Ltd. October：Through a company split, energy wholesale business of Mitsuuroko Co., Ltd. is transferred to Mitsuuroko Vessel Co., Ltd., Mitsuuroko Vessel Tohoku Co., Ltd., Mitsuuroko Vessel Chubu Co., Ltd. and Mitsuuroko Vessel Kansai Co., Ltd. October：Mitsuuroko Co., Ltd. takes over Triforce Corporation and its businesses through an absorption-type merger October：Logitri Holdings Co., Ltd. is established as a holding company for logistics-related businesses
2019
January：Mitsuuroko Provisions Co., Ltd. and Mitsuuroko Grocery Co., Ltd. (former Cocostore Retail K.K.) merge April：Commercial service launched offering LPG meter reading using IoT. April：City gas business service launched through a business alliance with TEPCO Energy Partner, Inc May：Mitsuuroko Sekiyu Co., Ltd. changes name to Mitsuuroko Drive Co., Ltd June：Company enters into strategic business alliance with Siamgas & Petrochemicals PCL
Construction of VIP Ojima, 
Tianjin Sanrin Steel Vessel Technical Inspection Co., Ltd. established in Tianjin, China
Completion of 5,000-kl tank 
A new filling center in Fukushima was constructed with the aim of improving operational and logistical efficiency
The Ioka Wind Power Plant becomes our second power generation facility, after Teshio Wind Power Plant
New business in the field of lifestyle services begins with sale of Fuji no Takaramono Vanadium 63 Natural Mineral Water
Opening of Hamabowl EAS
Yamanakako Factory of Fuji Seisui begins operation 
