there aren't very many authentic izakayas in the city but Riki is one of the better ones. Riki serves a huge selection of small dishes (cold and hot) at cheap prices in a casual setting. They also have a selection of grilled stuff on skewers. I would not recommend ordering the sushi/sashimi - not that special, you can get better ones elsewhere. you come to Riki for the small plates and skewers.