@Arcara
Just the fact that he had a good sword on him was enough to know that he was a samurai, how could he not be having one?
@charkan
And now he goes back to the past to assume his shōgun position once again supported by Nobunaga.
How will this work?
The shogun can be only one person. Who would respect a shogun that depends on another strong man? Or Nobunaga kills him or after Nobunaga's death he will be appointed his substitute and rightful successors of the Ashikaga Shogunate. I imagine if Shizuko will notice that Akechi Mitsuhide will still betray Nobunaga but let happen to kill Nobunaga and preserve her Uncle, at the same time using her influence to make him take control. He may even marry Nouhime to make his case stronger.
EDIT: also, Shizuko could protect the Jesuits to exploit he pacifist message of Christianity in the post-war world?
EDIT2: oh, yes, this would also means that Shizuko would have to defeat threat to him, like Toyotomi and Ieyasu...