This series is probably one of the best of it's kind. It takes a few episodes to warm up (the first two episodes are a bit choppy in their storytelling) but once I got to disk two I was so hooked I was hunting for the further seasons online to make sure my fix wouldn't end with this show. (Answer- there won't be any from this company, which just folded the division that produced this. There won't even be any more printings of this set either, so get them while you can!)
Sonny Chiba plays Hattori Hanzo, the leader of the Iga Ninja clan in Edo (Tokyo) who have fallen into disfavor and work as the operators of a bathhouse (female nudity in every episode!). But the Ninja who work for the government, the Kouga Ninja, are corrupt and working for the wrong team, so the Shogun's guardian begins hiring Hanzo's team to do special missions for him. Each episode is like a mini-movie where they're trying to cram 2 hours worth of story and action into a single hour, and most of the time they succeed amazingly well. If you're a Ninja fan or a Martial Arts movie fan I highly recommend this set.