The Tale of the Bamboo Cutter (Taketori Monogatari) is called "The ancestor of tales", as it is the oldest one in Japan. The author and the year it was created are unknown, but it has a high status in the history of Japanese literature. The Girl from Mottled Bamboo (Banzhu Guniang) is an old story that spread in Sichuan Tibetan areas of China, and is extremely similar to The Tale of the Bamboo-Cutter in many respects: the birth from bamboo, the problem of the proposed topic, the figures and story line. Therefore, it has drawn the attention of Chinese and Japanese scholars and has created controversy. This article focus on research activities and results regarding these two stories, pays important attention to the representative results of the comparative study dating back to the 1970s, and investigates the problems and deficiencies in previous research.