Oba Corporation

Founder Munenori Oba inherited the management of Wachi Construction Office and established the company in Koto Ward, Tokyo

October 1, Taisho 11 (1922)

Changed the company name to Oba Munenori Civil Engineering Office and relocated to Yoyogi Tomigaya, Toyotama District, Tokyo Prefecture, establishing civil engineering design and construction supervision departments

Received an order for a large-scale residential land development project, Togoshi New Town Development, pioneering new town development

Changed the company name to Oba Civil Engineering and Architecture Office

Reorganized into Oba Civil Engineering and Architecture Corporation, establishing construction departments for architecture and civil engineering

October 1, Showa 22 (1947)

Established a subsidiary, Oba Lumber Industry Co., Ltd.

Opened Nagoya branch

Established an aerial survey department at headquarters, advancing into aerial surveying field

Opened Osaka branch office

Completed new headquarters building in Meguro-ku, Tokyo

Changed the company name to Oba Co., Ltd. and separated the Tokyo branch

Listed on the Second Section of the Tokyo Stock Exchange and made shares publicly available

Opened Sendai branch office

Relocated the head office to Shibuya-ku, Tokyo

Established Shizuoka Sales Office and Hiroshima Sales Office

Yokohama Sales Office and full-scale entry into the environmental assessment field

Completion of the new head office building

Established the Urban Regeneration Business Division and the Environment Division

Formulated the

Market change to the First Section of the Tokyo Stock Exchange

Relocation of head office and Tokyo branch to Chiyoda-ku, Tokyo

Opening of Niigata sales office, Mie sales office, North Kanto branch, and Shizuoka sales office

Relocation of Hiroshima branch to Ginzancho, Hiroshima City, opening of Omi-Hachiman sales office, and abolition or relocation of branches and sales offices

Received the Civil Engineering Society Technical Award (Group I)

Opening of Hamamatsu sales office and Toyota sales office

Opening of Yamaguchi sales office and Yamanashi sales office

Relocation of Yokohama branch to Nishi-ku, Yokohama City

Establishment of DX Promotion Office to accelerate initiatives toward DX

Opening of sales offices in Himeji City, Yamagata City, and Ishikawa (Kanazawa City)

Received the Grand Prize of the Civil Engineering Society Landscape and Design Committee Award for reconstruction and waterfront development of the old Kitakami River in Ishinomaki City