변방의 대지 홋카이도, 참전 군인과 아이누족 소녀가 금괴의 위치를 문신으로 새긴 탈옥수들을 쫓는다. 그리고 여기에 무뢰한들과 부대를 이탈한 군인 무리가 가세하며, 이들과의 치열한 쟁탈전이 시작된다.

In the 30th year, Nirasaki Den'emon established the Nirasaki Hokkaido Development Company with investment from Sonoi to build railway facilities. However, the endeavor faced criticism for attempting to buy Ainu land at low prices. Tokyo Nippo reporter Toshimasa Matsuzaka, who was actually Nirasaki's son, wants to expose the flawed practices of the company.

This documentary started as part of a photography project about the indigenous Ainu population in northern Japan, portraying people from tightly knit communities. They feel deeply connected by their culture and tradition. With gorgeous pictures, the directors explore how different generations of Ainu reflect on their identity after centuries of oppression.

In 1986, for the first time in 75 years, the "Chironnup Kamuy Iomante (the sending off of the spirit of the fox)" was held at Bihoro Pass, in Hokkaido. According to the Ainu's traditional beliefs, animals are "gods" called "Kamuy" who live in the "land of gods" ("Kamuimosiri"), but sometimes they come to the "land of humans" ("Ainumosiri"), to offer their meat and furs as gifts. The Ainu take care of them, and they eventually hold an "Iomante (spirit sending)". In this ceremony, people offer prayers, sing songs, and dance, and send the animal back to the "land of the gods" with food and souvenirs.

TOKYO Ainu features the Ainu, an indigenous people of Japan, living in Greater Tokyo (Tokyo and its surrounding areas), who are and actively in promoting their traditional culture in a metropolitan environment away from their traditional homeland, Hokkaido. Shedding a common assumption that all Ainu live in Hokkaido, the film captures the feelings, thoughts and aspirations of Ainu people that who try to follow the Ainu way no matter where they live.