Have you been to izakaya in Japan? It is a Japanese style casual bar where you can enjoy reasonably priced Japanese dishes, drinks, and nomihodai (all-you-can-drink). Izakaya is such common that there are many chains located near stations. Here is a list of the selected izakaya chains which feature different food and concepts. Check all and find the one that meets your need!
If you're looking for a great izakaya (Japanese style bar) or a big fan of seafood, you should try Isomaru Suisan. It is a causal chain restaurant often found near stations in Tokyo and the cities. The fresh seafood grilled in front of you is amazing! It's a place where you can order seafood and grill it yourself in the tiny grill they provide: clams, scallops and squid.