| Sep. 1978 | 
    Starts sole proprietorship PCB Design in Kohata,Uji city. | 
  
  
    | Dec. 1982 | 
    Established PWB Corporation with the capital of 2 million yen. | 
  
  
    | Mar. 1985 | 
    Transferred the Head Office to Kusatsu, Shiga. | 
  
  
    | Mar. 1986 | 
    Increased the capital to 8 million yen. | 
  
  
    | May 1988 | 
    Increased the capital to 18 million yen. | 
  
  
    | Jan. 1990 | 
     Established Tokyo sales office in Ota-ku, Tokyo, and started PCB design. | 
  
  
    | Aug. 1993 | 
    Established PCB Mie factory in Komono-cho, Mie-gun, Mie. | 
  
  
    | Dec.1995 | 
    Established Hanna sales office in Kitanagai-cho, Nara, and started PCB design. | 
  
  
    | May. 1996 | 
    Increased the capital to 48 million yen. | 
  
  
    | Feb. 1998 | 
    Transferred Tokyo sales office to Nakahara-ku, Kawasaki city, and changed the names of Tokyo and Hanna sales offices to Tokyo and Hanna business offices respectively. | 
  
  
    | Sep. 2001 | 
    Established PWB America, Inc. With the capital of $600,000 and started PCB design in US. | 
  
  
    | Mar. 2002 | 
    Mie Factory Acquired ISO9002 Certification (JQA-QM7999) | 
  
  
    | Aug. 2003 | 
    Moriyama Office was opened to meet the Business Expansion for System Development, Assembly & Wiring. | 
  
  
    | Dec. 2003 | 
    Company-Wide Acquired ISO9001-2000 (JQA-QM7999) certification | 
  
  
    | Jan. 2004 | 
    Received Warrant Bond from Venture Capital | 
  
  
    | Jan. 2004 | 
    Increased the capital to 63 million yen. | 
  
  
    | Jun. 2005 | 
    Increased the capital to 99.75 million yen by the third party new stock allocation | 
  
  
    | Feb. 2006 | 
    Received private placement bond from Mizuho Bank | 
  
  
    | Apr. 2006 | 
    Mie Factory Acquired ISO14000 Certification (JQA-EM5318) | 
  
  
    | Aug. 2006 | 
    Established Fukuoka business office in Yukuhashi, Fukuoka, 
  and started PCB design. | 
  
  
    | Oct. 2006 | 
    Started Technical Personnel Services. | 
  
  
    | Oct. 2009 | 
    Transferred Hanna business office to Honmachi,Moriguchi City,and changed the name of Hanna bussiness office to Osaka business office. | 
  
  
    | Oct. 2009 | 
    Company-Wide Acquired ISO9001-2008(JQA-QM7999) certification. | 
  
  
    | Apr. 2012 | 
    Fukuoka Office was closed. | 
  
  
    | Jun. 2017 | 
    Osaka Office was closed. |