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Past IGTC

  1. October 1971, Tokyo
  2. May 1977, Tokyo
  3. October 1983, Tokyo
  4. October 1987, Tokyo
  5. October 1991, Yokohama
  6. October 1995, Yokohama
  7. November 1999, Kobe
  8. November 2003, Tokyo (Report of IGTC '03)
  9. December 2007, Tokyo (Report of IGTC '07)
  10. November 2011, Osaka (Report of IGTC '11)
  11. November 2015, Tokyo (Report of IGTC '15)