Together with Shiroi Hana, which is just down the road on Clark, Matsuya is the other cheap Japanese restaurant in the Wrigleyville area.
Matsuya differs from Shiroi Hana mainly in ambience; Matsuya has a much more traditional Japanese restaurant look, with wooden booths and subdued lighting. It is not, I think, a romantic spot, but it can be cosy.
The main reason for coming to Matsuya is their combination meals. These come in at around $10 and are really good value, including miso soup, entree, and dessert.