Artaxerxes
Look out, he's got a gnu!
I'm watching now. I thought it was was going to be terrible after the utter shit set up in present day. Gets quite fun when he goes back to Edo Edo.
Yeah the modern day bit really dragged and the first episode was fucking long winded as hell but it finally got going when the time jump happened.
I do really recommend the Manga if you are into that sort of thing