|1929||Establishment of Hanshin Harbor Construction Co., Ltd. with joint-funding by the South Manchuria Railway and Yamashita Kisen (Yamashita Steamship) Co., Ltd. for the purpose of reclaiming a site fronting on Naruo, Nishinomiya City, Hyogo Pref. and constructing an industrial harbor.
President: Kamesaburo Yamashita, Head Office: Sakaemachi-dori, Kobe
|1932||Start of business as construction contractor in addition to Naruo Reclamation Project.|
|1935||Head Office relocated to Fushimicho, Higashi-ku, Osaka.|
|1938||Naruo Reclamation Project interrupted due to war.|
|1945||Head Office relocated to Kawaguchimachi, Nishi-ku, Osaka.|
|1946||Received order for Tonegawa River dredging project (Chiba Pref.) as first project after war.|
|1952||Head Office relocated to Fushimicho, Higashi-ku, Osaka.|
|1960||Tokyo Sales Office upgraded to Tokyo Branch.|
|1961||Head Office relocated to Kouraibashi, Higashi-ku, Osaka.
Listed in Second Section of Osaka Stock Exchange.
|1962||Listed in Second Section of Tokyo Stock Exchange.|
|1964||Decision to resume Naruo reclamation project.
Trade name changed to Toyo Construction Co., Ltd.
Listed in First Sections of Tokyo and Osaka Stock Exchanges.
|1965||Fukuoka Sales Office and Nagoya Sales Office upgraded to branches.|
|1967||Naruo reclamation ground-breaking ceremony.|
|1968||Tokyo Headquarters established. Okayama, Takamatsu, and Kanazawa Sales Offices upgraded to branches.|
|1969||Tohoku Branch opened.|
|1970||Absorption merger of Hitachi Zosen Coastal Construction Co., Ltd.|
|1971||Hokkaido Branch opened.|
|1972||Singapore Sales Office opened (start of advance into overseas markets).|
|1973||Overseas Business Dept. established (now International Branch).
Received order for Navotas Fishing Port Construction Project (Philippines).
Manila Sales Office (Philippines) opened.
|1976||Construction Dept. and Construction Sales Dept. established (advance into construction field).
Joint venture company CCT established in Philippines.
Name of Tokyo Headquarters changed to Tokyo Head Office.
|1977||Start of general sales of plots in Naruohama Industrial Center.|
|1983||Narawa Materials Center opened.|
|1984||Naruo Engineering Center opened (now Naruo Research Center).|
|1986||Sales of Naruohama Industrial Center completed.
Received order for Kansai International Airport Island seawall construction (Osaka Pref.)
|1990||Tomac Co., Ltd. established (company specializing in offshore construction).|
|1992||Received order for Changi Airport Reclamation Project (Singapore).
Miho Research Center established.
|1995||Occupied in Great Hanshin Earthquake recovery.|
|1997||Phnom Penh Sales Office (Cambodia) opened (now Phnom Penh Branch).|
|1999||Received company-wide ISO9001 certification.
Received order for Kansai International Airport Phase II construction (Osaka Pref.).
|2000||Received order for Chubu Centrair International Airport seawall, etc. construction (Aichi Pref.).|
|2001||Received company-wide ISO14001 certification.|
|2002||Announcement of business cooperation with Maeda Corporation.|
|2003||Announcement of Toyo Value-Up Plan (strengthening of cooperation with Maeda Corp., capital increase, etc.)|
|2004||Hanoi Sales Office (Vietnam) opened.|
|2005||Received order for Tokyo International Airport (Haneda Airport) Runway D construction (Tokyo).|
|2006||Jakarta Sales Office (Indonesia) opened.|
|2007||International Division upgraded to International Branch.
Head Office relocated from Kandanishikicho, Chiyoda-ku, Tokyo to Omi, Koto-ku, Tokyo.
|2011||Occupied in Great Tohoku Earthquake recovery.|
|2012||Reverse stock split executed (5 shares to 1 share).
Received order for Mombasa Port Container Terminal construction (Kenya).
|2013||Received order for Nghi Son Refinery plant (Vietnam) offshore work.|
|2014||Yangon Branch Office (Myanmar) opened.|