| 2009 | 06 | Opened Kitakantou Distribution Center at Utsunomiya City Tochigi Pref. |
| 2009 | 05 | Newly built and moved Sendai branch to Miyaginoku,Sendai City |
| 2008 | 05 | Opened Tokyo-Nishi Office at Hachioji City, Tokyo. |
| 2007 | 09 | Newly built and moved Sapporo branch to Higashiku.Sapporo City. |
| 01 | Tokyo Branch moved to Higashi-shinagawa,Shinagawa ku,Tokyo. | |
| 2006 | 10 | Opened Keiji Office and Kyoto distribution Center at Yawata City,Kyoto Prefecture. |
| 04 | Newly built and moved Hiroshima Branch to Minamiku,Hiroshima City. | |
| 2005 | 11 | Information & Communication Bussiness Dept. and STEC Co.,Ltd. moved "STEC Building" located Suita City OSAKA. |
| 08 | Increased capital to \2,575million. | |
| 2004 | 12 | Toyohashi Office moved to Nishi Miyuki-cho,Toyohashi City. New Office building was equipped with solar power generating system. |
| 07 | Main office and all branches acquired ISO14001 certification. | |
| 04 | Set up SHANGHAI SENSHU ELECTRIC INTERNATIONAL Co.,LTD. | |
| 02 | Main Office acquired ISO9001 certification. | |
| 2003 | 08 | Increased capital to \2,215million |
| 02 | Set up SENSHU ELECTRIC INTERNATIONAL CO.,LTD. | |
| 2002 | 11 | Was listed on Tokyo Stock Exchange Section 2 Tokyo Branch acquired ISO9001 certification. |
| 2001 | 12 | Set up Fabrication Site at Nagoyai Branch |
| 11 | Set up SENSHU ELECTRIC(THAILAND) CO., LTD | |
| 04 | Set up Senri Fabrication Center | |
| 2000 | 11 | Set up Fabrication Site at Sendai Branch |
| 08 | Set up Fabrication Site at Kawasaki City,Kanagawa Prefecture | |
| 1999 | 06 | Commemorated 50th Anniversary(at Imperial Hotel,Osaka) |
| 1998 | 10 | Set up Fabrication Site at Takaoka Office |
| 04 | Set up Fabrication Site at Sapporo Branch Opened Thai Representative Office Tokyo Branch newly built and moved to Keihinjima,Ohtaku,Tokyo |
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| 02 | Renamed Osaka Office to Main Office and Takamatsu Office Changed to Takamatsu Branch | |
| 1997 | 10 | Fukuoka Branch newly built |
| 06 | Organized Information & Communication Business Dept. | |
| 1996 | 05 | Takamatsu Office moved to Asahi Shinmachi,Takamatsu City Toyohashi Office moved to Shin Sakae-cho,Toyohashi City |
| 01 | Was appointed and listed on Osaka Stock Exchange Section 2 Organized International Dept. Sendai Branch newly built |
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| 1995 | 12 | Set up Fabrication Site at Fukuoka Branch |
| 1993 | 12 | Osaka Office newly built and opened at 1-4-8 Minami-Kaneden,Suita City Osaka Prefecture |
| 11 | Newly built and opened Nagoya Branch at Nishiku,Nagoya City Takaoka Liaison office changed to Takaoka Office |
|
| 1992 | 11 | Separated STEC Development Dept and set up STEC Co.,Ltd.and started sale of computors by having opened Apple Center |
| 1991 | 11 | Obtained permit from the Governor of Osaka Prefecture as a registered contractor (Electrical Engineering & Piping Work) |
| 06 | Was listed on Osaka Stock Exchange new Section 2 and increased capital to \2,104million | |
| 1990 | 10 | Increased capital to \462.5million |
| 1989 | 11 | Newly built and moved Saitama Office to Yoshino-cho,Ohmiya City,Saitama Prefecture |
| 04 | Newly built and opened Data Processing Center at 1-4-21 Minami-Kaneden,Suita City,Osaka Prefecture | |
| 1988 | 10 | Increased capital to \312.5million |
| 08 | Moved Takaoka Liaison Office to Nomura,Takaoka City | |
| 06 | Increased capital to \195million | |
| 1987 | 05 | Opened Saitama Office at Miyahara-cho,Ohmiya City,Saitama Prefecture |
| 04 | Newly built and moved Hiroshima Branch to Minamiku,Hiroshima city | |
| 1985 | 07 | Set up STEC Development Dept to develop and comply with needs for high technology |
| 1984 | 11 | Fukuoka Office and Sendai Office changed to Fukuoka Branch and Sendai Branch |
| 8 | Rebuilt and expanded Osaka Office and opened R&D Dept and started terminal fabrication and development of new products | |
| 1983 | 09 | Opened Toyohashi Office at Toyohashi city,Aichi Prefecture |
| 1982 | 04 | Participated in Osaka Int'l Fair Mechatoronics Robot Show |
| 1980 | 01 | Increased capital to \120million |
| 1977 | 11 | Takamatsu Liaison Office Changed to Takamatsu Sales Office |
| 10 | Consolidated Kawasaki Office into Tokyo Office and moved Tokyo Office to Saiwai-ku,Kawasaki City | |
| 05 | Opened Sendai Office at Ohgimachi,Sendai City | |
| 1976 | 02 | Increased capital to \72million |
| 1975 | 05 | Newly built and moved Sapporo Branch at Higashiku,Sapporo City |
| 1974 | 04 | Newly built and opened Fukuoka Office at Hakataku,Fukuoka City Opened Takamatsu Office at Sanjyo-cho,Takamatsu City |
| 01 | Tokyo Office,Sapporo Office and Hiroshima Liaison Office changed to Tokyo Branch,Sapporo Branch and Hiroshima Branch | |
| 1973 | 06 | Opened Takaoka Liaison Office at Takaoka City,Toyama Prefecture |
| 01 | Increased capital to \48million | |
| 1971 | 11 | Newly built and opened Kawasaki Office at Kawasaki City,Kanagawa Prefecture |
| 07 | Moved Sapporo Office to Chuo-ku,Sapporo City | |
| 1970 | 06 | Newly built and opened Osaka Office-cum-Dlstribution Center at 1-6-1 Minami-Kaneden,Suita City,Osaka Prefecture and consolidated Senri Office |
| 01 | Increased capital to \40million | |
| 1969 | 09 | Opened Sapporo Office at Kita 1-Jyo Higashi,Sapporo City |
| 1968 | 04 | Opened and moved to new Hiroshima Office at Nakaku,Hiroshima City |
| 03 | Opened Senri Office at Ibaraki City,Osaka Prefecture | |
| 01 | Increased capital to \30million | |
| 1967 | 02 | Built new Tokyo Office at Minatoku,Tokyo |
| 1966 | 06 | Increased capital to \20million |
| 1965 | 06 | Opened Osaka-Minami Office at Sumiyoshiku,Osaka city |
| 1964 | 06 | Increased capital to \10million |
| 1962 | 06 | Built Senshu Bldg and made it Head Office at 2-4 Togano-cho,Kitaku,Osaka city |
| 1960 | 11 | Opened Tokyo office at Taitoku,Tokyo |
| 1958 | 11 | Consolidated Godo Electric Co.,Ltd.a sister company and increased capital to \2.8million |
| 1956 | 04 | Increased capital to \1.8million |
| 1954 | 02 | Hiroshima Liaison Office opened at Teppo-cho,Hiroshima City |
| 1949 | 11 | Senshu Electric Co.,Ltd.established with capital of \300,000. |
| 1947 | 01 | Founded Nishimura Electric Trading Firm at 15 Doyama-cho,Kitaku, Osaka City and started sales of cables & electrical materials |
