Frog Highball Bar is a bar in Mangwon, Seoul, that serves highballs with mackerel bozushi, inari sushi, and chicken nanban. Every whisky is made into a highball, and the range is large enough to choose one on recommendation. The interior is small and all seating is at the bar, so it suits parties of two or three. There are not many seats, so you need to reserve or arrive at opening time.