| 1st | 1994 Nov | Kogakuin University | Tokyo | 
  
    | 2nd | 1995 Aug | Int'l House | Osaka | 
  
    | 3rd | 1996 Nov | Kobe Int'l Conference Center | Hyogo | 
  
    | 4th | 1997 Sep | Kogakuin University | Tokyo | 
  
    | 5th | 1998 Jul | Kogakuin University | Tokyo | 
  
    | 6th | 1999 Jul | Kogakuin University | Tokyo | 
  
    | 7th | 2000 Jul | Kogakuin University | Tokyo | 
  
    | 8th | 2001 Jul | Kogakuin University | Tokyo | 
  
    | 9th | 2002 Jul | Kogakuin University | Tokyo | 
  
    | 10th | 2003 Jul | Kogakuin University | Tokyo | 
  
    | 11th | 2004 Aug | Keio Plaza Hotel | Tokyo | 
  
    | 12th | 2005 Jul | Kanazawa Bunka Hall | Ishikawa | 
  
    | 13th | 2006 Jul | Keio Plaza Hotel | Tokyo | 
  
    | 14th | 2007 Jul | Awaji Yumebutai Int'l Conference Center | Hyogo | 
  
    | 15th | 2008 Jul | The National Museum of Emerging Science and Innovation (Miraikan) | Tokyo | 
  
    | 16th | 2009 Jul | Nara Centennial Hall | Nara | 
  
    | 17th | 2010 Jul | Tokyo Institute of Technology | Tokyo | 
  
    | 18th | 2011 Jul | Ryukoku University Avanti Kyoto Hall | Kyoto | 
  
    | 19th | 2012 Jul | Ryukoku University Avanti Kyoto Hall | Kyoto | 
  
    | 20th | 2013 Jul | Ryukoku University Avanti Kyoto Hall | Kyoto |