Quite possibly the greatest bad Kung Fu movie of all time: hilarious without riffing, but could be one of the all-time greats with the LEGENDARY THREE attached!
Aside from the usual comically bad dubbing this film also contains the following compelling features:
Flashback sequence which is clearly from a completely different film and has nothing to do with the rest of the movie.
Period setting during the Japanese occupation, complete with period cars (sometimes) yet everyone is dressed in 70s fashions (wide collars, poly-blend blazers, etc.) and hairstyles.
The transfer is widescreen-4:3, but centre frame locked rather than pan-and-scan so multiple conversations take place with only a table and hands on knees visible.
This movie was required viewing in my university dormitory. Now appears to be on at least a second DVD pressing at Amazon: https://www.amazon.com/Blazing-Ninja-Sonny-Tanaka/dp/B07C5K53P5/ref=sr11?keywords=blazing+ninja&qid=1583072548&sr=8-1