Ninja Movies

[Swamp Thing]

Found three more that look cool!

The Ninja Mission (1984) http://www.imdb.com/title/tt0087806/
Sakura Killers (1987) http://www.imdb.com/title/tt0093910/
White Phantom (1987) http://www.imdb.com/title/tt0184016/

Pretty good list here: http://www.flickchart.com/Charts.aspx?genre=Ninja+Film

[God the Worms]

Hot Damn! These all look hilarious. I too have been interested in the cheesy ninja genres, thanks everybody.

And thank you Swamp Thing for beating me to this question.