A former member of the Goto-gumi recounted the murder as follows: "We set it up to stage his murder as a suicide. We dragged him up to the rooftop and put a gun in his face. We gave him a choice: jump and you might live or stay and we'll blow your face off. He jumped. He didn't live."

Looks like it’s available on justwatch which I’ve never heard of . 20-30+ year old movies are hard to find. https://www.justwatch.com/us/movie/minbo-the-gentle-art-of-j...