The kanji 魚 means "fish". I came here last weekend, and it was really crowded as each dish cost only 100 yen. It's close to a little over one dollar.
Usually they put two pieces on a dish. But if the sushi is really good like fatty tuna, you can have only one piece on one dish.
And sweet potato was available too!
As each dish was only 100 yen, you'd feel full with only 8 dishes or so. That translates into 800 yen for lunch. It would be reasonable for anybody and you can also have fun picking up only your favorites :)