can someone recommend a good アニメ

I was gonna suggest 薄桜鬼 〜新選組奇譚〜 Shinsengumi Kitan (which is a great samurai anime) but there's a lot of romance in it. Dunno, :/ あなた can try it if あなた want. I thought it was great, but it's really up to you...
However, though there is only ONE ninja, あなた can't go wrong with Sengoku Basara! If あなた haven't already seen it, it's based on a video game, which was based off of the actual history of Japan. Lots of cool samurai's and epic battle scenes. I linked the opening if you're intersted.
^_^ hope that helped!