Home > Corporate Information > History June 1958 Founded as Sanwa Housing Co., Ltd. Engineering Department June 1972 The Engineering Department became independent from Sanwa Housing Co., Ltd., and Sanwa Construction Co., Ltd. was established in Amagatsuji-cho, Nara City with a capital of 30 million yen. President Naomasa Kobayashi August 1975 Headquarters relocated to 2-chome, Saidaiji Higashimachi, Nara January 1976 Opened Osaka Sales Office in Higashikozu-cho, Tennoji-ku, Osaka March 1980 Nishinokyo Material Center newly established in Shichijo-cho, Nara City May 1983 Opened Kyoto Sales Office in Kizumachi, Soraku-gun, Kyoto Prefecture August 1985 Increased capital to 60 million yen Promoted Osaka / Kyoto sales office to branch office November 1993 Received a courtesy letter from the Nara Tax Office May 1995 Wakayama office opened (Shobutani, Hashimoto City, Wakayama Prefecture) June 1995 Osaka branch relocation (Minamihonmachi, Chuo-ku, Osaka) August 1995 Headquarters building completed June 1998 Naomasa Kobayashi appointed Chairman of the Board and Kunio Arii appointed President and Representative Director November 1998 Received a courtesy letter from the Nara Tax Office April 1999 Wakayama office promoted to branch office October 2000 Miyuki Hashimoto residential area sales start November 2000 Minister of Labor Award for Promotion of Construction Employment Improvement December 2000 Obtained ISO9002 certification, the international standard for quality control and quality assurance July 2001 Transferred Housing Division to Sanwa Housing Co., Ltd. March 2003 Obtained ISO9001: 2000 (JISQ9001: 2000) November 2003 Received a courtesy letter from the Nara Tax Office August 2004 Naomasa Kobayashi, Chairman and Representative Director Retired July 2006 Kinki Regional Development Bureau Yamatogawa River Office Director Commendation "Hieda Embankment and Revetment Construction" May 2007 Wakayama branch closed June 2007 Nobuyoshi Kobayashi appointed as Representative Director and Vice President November 2008 Received a courtesy letter from the Nara Tax Office March 2009 Kyoto branch closed April 2010 Completed transition to ISO9001: 2008 (JISQ9001: 2008) August 2011 Obtained ISO14001: 2004 (JISQ14001: 2004) certification June 2012 Kunio Arii appointed as Chairman of the Board Nobuyoshi Kobayashi appointed as President and Representative Director Corporate Philosophy / Greetings Overview History Suppliers access Employment information Recruitment of partner companies ISO9001 / ISO14001 - Corporate Information - Business - construction results - Sanwakensetsu promise of - Useful information - Staff Blog - site report - Site Map - Contact Us - Privacy Policy - Terms and Conditions Sanwa Construction Co., Ltd. Headquarters: 3-7 Saidaiji Sakaemachi, Nara City TEL: 0742-36-1138 (Representative) FAX: 0742-33-9496