October 1961 Established at the current site with the capital of 500,000 yen January 1963 Capital increased to one million yen August 1967 Haruo Yoda assumed the position of President and Representative Director November 1968 Capital increased to four million yen October 1972 New company building completed, capital increased to eight million yen October 1973 Capital increased to 16 million yen February 1978 Capital increased to 35 million yen January 1979 Capital increased to 65 million yen October 1981 Capital increased to 99.9 million yen November 1981 20th anniversary ceremony held October 1986 Haruo Yoda assumed the position of Chairman of the Board and Representative Director October 1986 Katsumi Koda assumed the position of President and Representative Director September 1991 30th anniversary ceremony held September 1994 Yokohama Sales Office opened July 2000 ISO9001 certified (Registration No. JICQA0678) August 2000 First privately subscribed bonds issued December 2000 Minami Plant completed (Pipe manufacturing plant) November 2001 40th anniversary ceremony held February 2002 Kunihito Takeuchi assumed the position of President and Representative Director October 2002 Hirofumi Kiyohara assumed the position of President and Representative Director March 2005 Nishi Plant completed (Aluminum manufacturing plant) November 2011 50th anniversary ceremony held December 2012 EcoAction 21 certified (Registration No.0008954) October 2014 Start TPM Activity June 2015 Tokyo Sales Office opened July 2016 Yamaguchi Sales Office opened April 2020 Shinkami Plant opened