OKASAN is a modern izakaya bar on Lang Suan Road in Lumphini, Pathum Wan, Bangkok, serving yakitori, sushi, sake, beer and cocktails. Yakitori is the signature, alongside dishes such as crispy rolls, gyu steak fried rice and salmon croquettes. It stays open until 1 AM, takes reservations through Line, and has a karaoke room for groups. Some menu items are on the higher end of the price range.