Taoyuan-city, Taiwan, 2024
Nagoya-city, Aichi, 日本, 2022
Zurich, 瑞士, 2020
Tianjin, 中国, 2012
Seongnam City, Gyeonggi-do, South Korea, 2010
Niigata-city, Niigata, 日本, 2009
Fussa-city, Tokyo, 日本, 2008
Yokosuka-city, Kanagawa, 日本, 2006