Sake Ryoma Ryuma is a Japanese sake-focused izakaya in the Kyobashi district of Chuo City, Tokyo, where office workers stop by after leaving work. It carries a wide range of Juyondai sakes and also serves grilled fish and light snacks. Ordering sake brings a large plate of several small side dishes per person, and the tamagoyaki is made with ten tokudama eggs. The interior is on the small side.