United States
Republic of Austria
United States ‧ Territory of Guam
Republic of Korea ‧ South Chungcheong Province
Japan ‧ Kagawa Prefecture
Belize
Japan ‧ Mihara City, Hiroshima Prefecture
Republic of the Marshall Islands
Kingdom of the Netherlands ‧ Utrecht Region
Japan ‧ Tsukubamirai City, Ibaraki Prefecture
Japan ‧ Chiba Prefecture
Republic of Poland
Republic of South Africa ‧ Johannesburg
Republic of Malawi ‧ Matola
Japan ‧ Choshi City, Chiba Prefecture