Midori Toko was born in Urakawa, Hokkaido, and moved to Lake Akan Ainu Kotan after getting married. She acquired a shopfront in the Ainu Kotan with her husband, a wood carving artist named Akira Toko, and started a folk craft shop. At that time, the tea and snacks that she served to the riders who stopped by at Akanko Onsen became popular, and she renovated a part of the folk craft shop into a café space. This was the beginning of PORONNO, a restaurant that still attracts many customers seeking Ainu cuisine. While managing the shop, Midori Toko passes on to her family and the younger generations in the community the cooking, embroidery, weaving, singing, and dancing skills that she learned from her grandmother and mother.

Midori Toko loves crafting things, including embroidery and knitting. She gets inspiration for her work from the magnificent forests and lakes of Akan-Mashu National Park that surround the Ainu Kotan and from the changing colors of the mountains and sky in each season. Sometimes, she even gets ideas for color combinations or pattern shapes from the grapevines. Her philosophy of using creativity to inspire her work from nature is essential to the spirituality of Ainu culture, which values harmony with nature. Midori Toko likes bold and powerful patterns, which are a notable feature in her embroidery works, which often feature large Ainu patterns that cover the whole surface.

Midori Toko's daughters, Emi Shimokura and Fumiko Goukon, also live in Akanko Onsen and are involved with Ainu culture. Emi and her husband, Ague, run the "cafe & gallery KARIP," where they base their activities. Fumiko manages PORONNO, the restaurant that her parents opened, alongside her husband, Yoshifuru. The younger generation of Midori Toko's family is deeply involved with Ainu culture, exploring new creativity while learning traditional skills. Midori Toko passes on the spirituality and expression of Ainu culture that she inherited from her grandmother and mother to her children, grandchildren, and others. KARIP and PORONNO attract many travelers and local friends who are fascinated by the Ainu culture in Akan Onsen. Perhaps the gentle atmosphere that welcomes customers has been inherited from the feelings that Midori Toko had when she offered snacks to riders many decades ago. Midori Toko says that Ainu patterns are powerful. She hopes that their beauty will touch someone's heart and spread to more people .