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2016
Japan, Yokohama
2014
Korea, Seoul
2013
Switzerland Luzern
Japan, Kanagawa Prefecture
Japan, Tokyo
2012 (Theoretical Project)
Theoretical project
2012
China, Tianjin
Japan, Iwate Prefecture
2010
Korea, Seongnam
2009
Japan, Tochigi Prefecture
2008
Japan, Niigata prefecture
Japan, Gunma prefecture
Japan, Tokyo
2007
Japan, Kanagawa prefecture
2005
Japan, Fukushima Prefecture
2004
Japan, Saga Prefecture
China, Beijing
2003
Japan, Tokyo Metropolis
2002
Japan, Saitama Prefecture
2001
Japan, Shizuoka Prefecture
Japan
2000
Japan, Hiroshima Prefecture
Japan, Hokkaido Prefecture
Japan, Kanagawa Prefecture
1999
Japan, Saitama Prefecture
1998
1996
Japan, Okayama Prefecture
Japan, Miyagi Prefecture
1995
JAPAN Kamakura
1994
Japan Kanagawa Prefecture
Japan Kanagawa prefecture
1993
Japan Kanagawa prefecture
Japan Kanagawa prefecture
Japan Kanagawa prefecture
Japan Kanagawa prefecture
1992
Japan Tokyo
Japan Okayama Prefecture
Japan Kanagawa prefecture
Japan Kanagawa prefecture
1991
Japan, Kumamoto Prefecture
1989
Japan, Kanagawa Prefecture
1988
Japan, Tokyo
Japan Tokyo Metropolis
1987
Japan Kanagawa prefecture
Japan Kanagawa prefecture
1986
Japan, Kanagawa Prefecture
1985
Japan Kanagawa prefecture
1984
Japan Tokyo
1983
Japan Tokyo
Japan Tokyo
1982
Japan, Kanagawa Prefecture
1981
Japan Tokyo
1978
Japan, Kanagawa Prefecture
Japan Tokyo
Japan Kanagawa prefecture
1977
Japan, Nagano Prefecture
Japan Kanagawa prefecture
1975
Japan Kanagawa Prefecture