| Feb. 1937 | Established Hasegawa Komuten in Amagasaki-shi, Hyogo |
|---|---|
| Aug. 1946 | Incorporated Hasegawa Komuten Co., Ltd., headquartered in Himeji-shi, Hyogo |
| Feb. 1951 | Opened Tokyo branch Office |
| Aug. 1953 | Transferred headquarters to Osaka |
| Apr. 1965 | Listed on the 1st Sections of Tokyo Stock Exchange, Osaka Securities Exchange and Nagoya Stock Exchange |
| Feb. 1969 |
 Completed construction of "Ashiya Matsuhama Heights," the first condominium Haseko constructed |
| Jul. 1970 | Completed construction of "Nissho Iwai Shiroganedai Condominium," the first condominium Haseko constructed in Tokyo Metropolitan Area |
| Dec. 1970 | Transferred headquarters to Hasegawa Building No. 8 in Dogenzaka, Shibuya-ku, Tokyo |
| Dec. 1973 | Achieved number one of accumulated condominium construction in Japan (35,000 units) |
| Dec. 1974 | Completed construction of headquarters building, "Akasaka Long Beach Bldg.," in Akasaka, Minato-ku Tokyo and transferred headquarters there |
| Nov. 1977 |
 Completed construction of "Palais Royal Nagatacho," high-grade condominium |
| Jan. 1981 | Completed construction of " Shiba Head Office Building" in Shiba, Minato-ku, Tokyo and transferred headquarters there |
| May. 1984 |
 Completed construction of "Palais Royal Midorigaoka," the first rebuilt condominium |
| Oct. 1988 | Changed corporate name to HASEKO Corporation |
| Jan. 1989 | Completed "Century City Omiya Koen," a condominium with services for elder people |
| Oct. 1992 |
 Completed construction of "Acro City Towers," a 32-storied skyscraper condominium |
| Mar. 1997 | Obtained ISO 9001 certification, an international standard for quality control and quality assurance system, in Tokyo area *First such certification for a Japanese company in the "design and construction of multi-family dwellings" category |
| Jul. 1997 | Obtained ISO 9001 certification, an international standard for quality control and quality assurance system, in Kansai area for design and construction of multi-family dwellings |
| Dec. 1998 | Achieved construction of accumulated 300,000 units of condominiums |
| Mar. 1999 | Finished "Hills Kugahara," a large-scale replacement project |
| Dec. 2000 | Completed construction of "House Solana," Haseko’s first skeleton-infill housing |
| Jul. 2001 | Obtained ISO 14001 certification, a international standard for environmental management, in Kansai area |
| Oct. 2001 | Obtained ISO 14001 certification, a international standard for environmental management, in Tokyo area |
| Mar. 2003 | Started operation of "Century City Kita Urawa," a paid care house for elderly people |
| Apr. 2003 | Established "Haseko Anesis Corporation," a service-related new subsidiary |
| Sep. 2003 | Completed the "Urayasu AMC Project," an advanced multi-purpose urban development project |
| Aug. 2004 |
 Completed construction of "Fukasawa House," the first introduction of disaster prevention sets |
| Mar. 2005 | Participated in the reuse business and opened the first "KASIKOSH" store, a recycle shop |
| Nov. 2005 | Completed the "Shirokane Urban Renewal Project" in Shirokane, Minato-ku, Tokyo, that harmonized living, commercial and industrial settings |
| Mar. 2006 | Completed "OBER Grandio Haginaka," Japan's first rebuilding of a condominium applying the Revised Condominium Unit Ownership Act |
| Nov. 2006 | Created "Sakura no Sato," a large-scale new town |
| Mar. 2009 |
 Completed construction of "The Kitahama," a 54-storied condominium with 465 units built on the former site of a department store in Kitahama, Osaka |
| Jun. 2009 | Obtained certification as "long-life, high-quality housing" for the two projects of "BRANCHERA Urawa" and "BRANCHERA Suitakatayamakoen" - the first such certification in Japan for for-sale condominiums |
| May. 2011 |
 Completed construction of "BRANCHERA Urawa," a 18-storied condominium with 69 units, that was certified as "long-life, high-quality housing" |
| Jun. 2011 | Achieved construction of a cumulative total of 500,000 condominium units |
| Jul. 2011 |
 Completed construction of "BRANCHERA Suitakatayamakoen," a 10-storied condominium with 114 units, that was certified as "longlife, high-quality housing" |
| Mar. 2013 | Season Suite Shiki-no-Mori certified as a low carbon building (the first acquisition of such certification among for-sale condominiums) |
| May. 2015 | Sohgoh Real Estate Co., Ltd. became a subsidiary by share acquisition (the present consolidated subsidiary), Main businesses are for-sale real estate business, real estate solutions and condominium management businesses |
| Dec. 2015 | Joint Corporation became a subsidiary by share acquisition (the present consolidated subsidiary),Main businesses are for-sale real estate business and real estate management business |
| Feb. 2017 | Achieved construction of a cumulative total of 600,000 condominium units |
| Mar. 2018 | Established "Haseko Technical Center" (Tama-shi, Tokyo) |