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Hokkaido (northernmost of the four main islands of Japan)October 2010
Ishikawa prefecture (Hokuriku area)October 2009
Ishikawa prefecture (Hokuriku area)October 2007
Oita prefecture (Kyushu)October 2006
Kumamoto prefecture (Kyushu)October 2003
Fukuoka prefecture (Kyushu)October 2001
Ehime prefecture (Shikoku)October 1998
Osaka (metropolitan area)October 1997
Hiroshima prefecture (Chuugoku area)November 2020
Shizuoka prefecture (Chuubu area)November 2019
Hiroshima prefecture (Chuugoku area)November 2018
Toyama prefecture (Hokuriku area)November 2018
Tochigi prefecture (Kantou area)November 2018
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