|1500s||Played an active role as ODA family's vassal.|
|1582||After Honno-ji Incident, moved to Iida city, Nagano Prefecture.|
|1598||Founded as a cotton business in Iida City.
(Watahan, the company name, derived from the name of the owner, Wataya Hanzaburo.)
|Middle in the Edo Period||Received permission to adopt a surname and to wear a pair of swords. Used family name Nohara.|
|Late in the Edo Period||Achieved the highest rank "Higashi Ozeki" in the family status ranking list.|
|1868||Changed business from cotton to a hardware shop.|
|1949||Established Watahan Doutetsu Kanamono Co., Ltd. (current Watahan & Co., Ltd.) with a capital of ¥200,000.|
|1953||Established "Ryukyo Scholarship Foundation" for students in the local Han-i district who wished to attend high school. Started assistance according to Japan Scholarship Foundation.|
|1957||Started to donate school supplies to new elementary and junior high school students in family on welfare in Nagano and Shizuoka Prefectures (currently expanding the districts where there are stores and business offices sequentially).|
|1961||Established the new facility in Matsumoto City, Nagano and began steel frame construction business.|
|1962||Established the long roof manufacturing factory in Shizuoka City, Shizuoka and build the foundations of exterior roof construction.|
|1964||Established Watahan dormitory (later Seigaryo) to support students in the Han-i district who wished to attend high school.
Opened Watahan Store Iida as a general household product store.
|1965||Began to deal with Mexican Opal business.
Started greening business by using the climate and natural features of Nagano Prefecture.
|1966||Completed the Watahan Nohara Building at Yotsuya, Shinjuku-ku, Tokyo as the Tokyo Head Office of Watahan Nohara Group.|
|1967||Opened a store in Mishima City, Shizuoka, along with a series of business offices in the Tohoku, Kanto, Chubu, Tokai, Kansai, Kyusyu and Okinawa areas.|
|1969||Opened Living Store Ina which deals with furniture and interior.|
|1970||Built Shizuoka Factory and increased the capacity of steel frame manufacturing.
Later, developed steel frame and bridge contract construction business, based on steel frame construction technologies.
|1972||Started interior construction business.|
|1977||Established Watahan Home-Aid Co., Ltd for DIY chain store business.
Opened Nagaike store (first store) in Nagano prefecture.
|1979||Opened Mexico-based affiliate Watahan de Mexico, S.A. DE C.V. to export Mexican made plant raw materials.|
|1980||Supported the establishment of social welfare corporation Watahan Nohara Sekizenkai.
Opened Villa Ryokufuen, a low-cost social welfare facility for the elderly.
|1981||Opened the Konan store and advanced to Aichi Prefecture.|
|1983||Developed cover method which renovates roofs without stopping operations of the factory.|
|1987||Developed double-decker multi-story parking garage construction for home use and build the foundations of self-driving multi-story parking garage construction.|
|1991||Completed its headquarters building in Iida City, Nagano.|
|1992||Watahan Home-Aid Co., Ltd. introduced POS systems in all stores.|
|1995||Opened the Pharmaceutical Laboratory in Kanagawa Prefecture.|
|1999||Commemorated the 400th anniversary of its foundation and contributed around 400 art works to Iida City.|
|2000||Opened a social welfare corporation "Kuwanomi" a western region day service center.
Shizuoka Factory, Iida Factory, the Steel Frame Business Department acquired ISO 9001.
|2001||Villa Ryokufuen acquired ISO 9002, as the first low-cost social welfare facility for the elderly in Nagano Prefecture.|
|2002||Began operation of the Nagano Distribution Center.|
|2003||Restructuring of Watahan Group and became a holding company.|
|2005||Introduced regular delivery of commodities to the Nagaike store and converted into super shopping center.
Opened "Kazakosi-no-sato" a special nursing home for the elderly.
|2007||Introduced fresh food to the Nagaike store and made it a full line super shopping center.
Later, converted into super shopping centers sequentially.
Opened the Candelilla processing and refining factory in Mexico.
|2008||Started "my 'special hometown' painting competition" as part of community youth development.|
|2010||Mitsuba Trading Co., Ltd. (current Watahan Trading Co., Ltd.) joined the group.|
|2012||Began operation of the low temperature distribution center.
Installed the recycle stations which collect used paper and plastic bottles at the stores.
|2013||Opened "cotton 1598 Iida showroom" for the community communication place.
Later, expanded to stores sequentially.
|2014||Established Right at Home Co., Ltd. for the purpose of home-visit care service.
Listed with second section of the Tokyo Stock Exchange.
Opened "Watahan Ginza Gallery" to introduce world living.
|2015||Kishi Co., Ltd. (current Watahan Fresh Market Co., Ltd.) joined the group and entered food supermarket business.
Opened "Emi-no-sato" for a special nursing home for the elderly.
Acquired the naming rights of "Watahan Iida Baseball park".
Listed with first section of the Tokyo Stock Exchange.
|2016||Jmart Co., Ltd.(current Watahan Jmart Co., Ltd.) joined the group. Expanded store network to Yamanashi, Kanagawa, Tokyo, Saitama Prefectures.
Established Myanmar-based affiliate SHIN WATAHAN Co., Ltd. for the purpose of overseas development of Parking.
Won a silver medal at Chelsea Flower Show held by Royal Horticultural Society.
Opened "Watahan football park FUTSAL POINT Shiojiri".
Developed "the rainwater storage column".
Released the extra-large sliding sash "GLAMO".
|2017||Established Watahan Partners Co., Ltd. as a cooperative purchasing company of Watahan groups.|
|2018||Opened the Kani store and advanced to Gifu Prefecture.
Abelnet Co., Ltd. joined the group.