As already mentioned by other yelpers:
The best miso ramen in Phx.
Very tasty soba noodles.
Katsu chicken entree is also very good.
Not pricey at all for what you get, which is a significant amount of very tasty food.
Decor:
Booth seats. Kind of out of date. Just like any other mom and pop restaurant that has been open since the 80s. Picture of a Japanese Kimono on the wall. Not "cool" in a "I wear D&G sun glasses and think RA has amazing sushi" kind of way, but cool in a "this place has great food, who the hell cares what it looks like" kind of way.
Service:
Don't expect to be seated at a table and your drink order taken by a waiter. We were handed two menus when we walked into the restaurant. We took the menus and made our own way to a table to figure out what we wanted. Once we had our mind set on what we wanted, I walked over to the cashier counter and placed our order with the owner. Only time we interacted with the owner again was when our food and drinks were brought to our table, and when we got up and payed at the cashier counter. So, yeah, you will not be waited on hand and foot. But I think that aspect of the owner's personality somehow adds to the Toh Zan experience. It's like, "You want what? To be served? LOL. First time?"