Just so you know, you picked the Betta equivalent of calling your dog "Spot," "Rex," "Max," or "Killer." But, I won't fault you for it. It is a downright clever name for a fish, and especially a betta.
I do like your plant you've got in there with him. Is it a live plant?
Bettas are alot of fun, and you will only find yourself sick with some sort of disease that makes you want to go out and buy more fish, bigger tanks, and more accessories. It is tremendously fun hobby, and I'm sure you'll continue to enjoy the company of your Sushi's curiousity as he explores his world, and watches yours.