Ninja Kamui is one of the most bland and uninteresting shows I've seen in a long time. I cannot believe the IMDb rating of 7.9 and the reviews calling this utter snoozefest, brilliant. Outside of competent voice work and some decent fights, it has few redeeming qualities to speak of. Generic premise that quickly turns ridiculous, awful and out of place soundtrack, hugely inconsistent animation quality, plus characters so two-dimensional you don't care about any of them at all. They try to elicit emotional reactions from you with very typical tropes that are so poorly done and transparent it's almost insulting. Throw in some mid-2000s CGI jank at the end showcasing the most boring boss fight ever, some shallow crap that passes as resolution, and then it just ends.
For some incomprehensible reason, people think this is good. Just look at the rave reviews. I can't tell if they're joke reviews or it's simply some I-am-14-and-this-is-deep nonsense. Do yourself a favor and don't waste time on this show. I had to force myself to watch it all the way through because I finish everything I start. It begins in common fashion, meanders and plateaus throughout, then takes a massive, anticlimactic nosedive at the end. This is uninspired trash designed to appeal to the lowest common denominator. You're better off watching almost anything else.