Buddha, Japan’s Answer to The Ten Commandments
When Cecil B Demille made The Ten Commandments he made at least some effort to stay true to his source material. It may not be the Bible verbatim, but it sticks to the general idea. Kenji Misumi had no such concern for his source material. To be fair Demill had a more stable and codified source. There is no single definitive book for Buddhism. The earliest history that was written down is the Tipiṭaka but it is far from an agreed-upon definitive narrative. Still, any way you look at it Buddha (the movie) does not have much relation to the traditional life story of the Buddha.