Question: What is the main occupation of Hiroshi Sakaguchi, founder of Ki Arts, a traditional Japanese company in Northern California and who features in the 2010 documentary film directed by Tao Ruspoli, based on Martin Heidegger's philosophy?
Sentence (from "Mark Wrathall"): His main interests include phenomenology, existentialism, the phenomenology of religion, the philosophy of popular culture, and the philosophy of law.
Relevant evidence: No