Koharu Hakata Donkotsu Ramen is a Japanese ramen restaurant in an alley about a five-minute walk from Busan City Hall Station. The base is donkotsu ramen, with spice level selectable in 0.5-step increments, and Sapporo saeu tangmyeon is also on the menu. It is closed on Saturdays, and the small space gets crowded at weekday lunch. Waiting occurs during peak hours.