I've been there several times, but I've never seen it on the menu or daily specials. O'Sushi, also in Hillsboro, has it on the menu, but I haven't tried it there.
No. At least not on the menu when I went.
http://www.syun-izakaya.com/menu.html
Not sure but you can always call to find out
Thanks! Your answer is awaiting moderation.