Based on the provided information:
Michiyo Mori is an acupuncturist from Japan associated with the practice of Danjiki (Japanese fasting). She is presented as a practitioner of food autonomy, claiming to have sustained herself for an extended period on a minimal liquid diet. According to promotional material for the film 'The Age of Fasting,' Mori's daily intake consists of a single glass of green juice.
The source indicates that Mori has maintained this lifestyle for over two decades. Her practice and claims are the subject of the aforementioned film, which documents her life of "not eating." The provided content does not include details on formal studies, observations outside of the film, or specific controversies related to her practice.