Kogaiken is a Western-style restaurant in Hiroo, Tokyo, serving napolitan, hamburg steak, and omurice. A hamburg menu topped with fried shrimp and egg is also available, and the omurice comes with ketchup flavor. Waits of about 10 minutes at 7 p.m. on weekends and 30 to 40 minutes at lunch have been recorded, so reserving before visiting is advised. The restaurant does not have many tables, so food takes time to arrive.