Cooperating Businesses and Associations
- Japan Post:
- Rosanjin Water (High Mineral Supplement Water for Rice Cooking)
- Osaka Gas:
- In Rosanjin's words, 'as far as cooking, absolutely, on the fire'; kitchen-related collaboration project
- Yoshida Seaweed (Tokyo Omori):
- Rosanjin's seaweed, Tokyo Michelin Restaurant, traditional Japanese dining (provider of seaweed since the establishment of Ginza Kyubei Sushi, patronized by Rosanjin)
- Furukawa Yosuke Shoten (Shiga):
- Japanese washi paper, table ornaments etc, manufacture designing
- Public Foundation, Yuhisai Kodokan:
- Raw egg on rice meeting circles and Kyoto culture
- Taru Publications (Osaka, Tokyo):
- wooden brewing barrels, Rosanjin-related publicity, soy sauce brewing, agricultural and cultural revival project
- Yuasa Shoyu Soy Sauce (Wakayama):
- planning and manufacturing collaboration