Participating countries and municipalities (tentative)
- the United Mexican States
- the Hashemite Kingdom of Jordan
- the Republic of Bulgaria
- the Republic of Serbia
- the Republic of Uganda
- Hungary
- the Republic of Rwanda
- Miyagi-ken
- Yamagata-ken
- Ibaraki-ken
- Tochigi-ken
- Gunma-ken
- Saitama-ken
- Chiba-ken
- Tokyo-to
- Niigata-ken
- Fukui-ken
- Nagano-ken
- Shizuoka-ken
- Aichi-ken
- Mie-ken
- Kyoto-fu
- Osaka-fu
- Hyogo-fu
- Tottori-ken
- Okayama-ken
- Yamaguchi-ken
- Fukuoka-ken
