Corner Construction Co., Ltd.

Former Chairman Seichi Hara founded the company.

Received its first investment as a construction company from Osaka Small and Medium Enterprise Investment Development Co., Ltd.

Opened the Amagasaki Main Office (now Hanshin Branch) in Muko-no-sou, Amagasaki City, Hyogo Prefecture.

Opened the Tokyo Branch and Kobe Branch.

Received a special appreciation certificate from Japan Housing Public Corporation (now UR Urban Renaissance Organization) for receiving more than ten consecutive awards for construction performance.

Implemented CI. Revamped corporate image, including the logo, and promoted a total system of planning, design, and construction as a business theme.

Secured the first comprehensive fitness club, City Sports Club Amagasaki 'Wuddy'. Entered the fitness club market.

Handled the new construction of Kobe Women's Junior College's Kobe Port Island New Campus from comprehensive planning to design and construction.

Responsible for constructing the 'Organic Building' designed by Italian designer Gaetano Pessio, attracting attention from various sectors.

Masashi Hara became president. Opened the Yokohama Sales Office.

Separated headquarters administrative functions to Naka-odoyama, Kita-ku, Osaka. Obtained certification for seismic isolation technology from the Minister of Construction (now Minister of Land, Infrastructure, Transport and Tourism).

Obtained ISO 9001 certification.

Received a certificate of appreciation from the Governor of Osaka Prefecture for long-term contributions to design and supervision services.

Received a certificate of appreciation from the Urban Development Agency (now UR Urban Development Agency) for long-term contributions to the development of private rental housing.

Merged the Kobe branch and Hanshin branch, establishing the Hanshin branch office covering all of Hyōgo Prefecture.

Received certificates of appreciation from the Metropolitan Area Incineration Building Corporation for business cooperation and construction performance for two consecutive years starting in 2004.

Opened the Kobe sales office under the Hanshin branch. Received the KANSAI Excellent Housing Complex Award from the Osaka branch of the Japan Housing Finance Agency for the design and construction of Preziir II.

Celebrated the 60th anniversary of founding. President Hara Shinichi received awards from the Minister of Land, Infrastructure, Transport and Tourism and the Governor of Osaka Prefecture.

Received a commendation from the Tokyo Oji Labor Standards Inspection Office for outstanding safety and health activities on the third residential construction project of Nouveau Akabanedai (reconstruction).

The Corner Construction First-Class Architect Office (Design Department) celebrated its 50th anniversary. Obtained ISO14001 certification. President Hara Shinichi received the Order of the Rising Sun, Gold Rays with Rosette.

Received the Osaka City Kirameki Corporate Award. Obtained construction industry BCP certification for disaster resilience from the Kinki Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism.

Received a certificate of appreciation from the UR Urban Regeneration Organization for outstanding construction of the Arakawa 2-chome residential project.

Received the highest inspection rating among 207 cases in the second quarter of 2016 for the construction (JV) of the Toyonaka Police Station renovation project by Osaka Prefecture.

Celebrated the 70th anniversary of founding. Relocated the Tokyo branch to Hamamatsu-cho, Minato Ward, Tokyo. Hara Shinichi became chairman. Hara Kyōhei became president.

Obtained certification as a Women's Empowerment Leading Company from Osaka City.

Established a capital and business partnership with Sumitomo Forestry Co., Ltd. and jointly promoted medium to large-scale wooden construction projects.

Chairman Hara Shinichi received the Order of the Rising Sun, Gold Rays with Neck Ribbon.

Hara Kyōhei became chairman and president. Became a 100% consolidated group company of Sumitomo Forestry Co., Ltd. and received the 2024 Health Management Excellence Corporation certification (small to medium-sized enterprise category).