Location
Date
Shibuya-ku, Tokyo
2009
Hiratsuka, Kanagawa
Chiba City, Chiba
Massachusetts, United States
Basel, Switzerland
Osaka, Osaka
Pennsylvania, United States
Ontario, Canada
2008
Mihara, Hiroshima
2007
Woodlands, Singapore
Nagoya, Aichi
Missouri, United States
2006
Izumo, Shimane
Tachikawa, Tokyo
2004
Bunkyo-ku, Tokyo
Fukui, Fukui
2003
Niigata, Niigata
Minato-ku, Tokyo
Yokohama, Kanagawa
Kouto-ku, Tokyo
2002
Minamiazumi-gun, Nagano
Dusseldorf , Germany
2001
Nihonmatsu, Fukushima
2000