Fatboy Izakaya Amarin is a Japanese restaurant in Bangkok (Siam, Chidlom & Ploenchit); open Mon–Thu 11:30–00:00; Fri–Sat 11:30–01:00; Sun 11:30–00:00; book at https://www.sevenrooms.com/landing/fatboyizakayaekkamai.
A Japanese izakaya with a party feel on the third floor of Gaysorn Amarin, with sake, highballs and a DJ. The Gaysorn Amarin branch is the newer location of the Fatboy izakaya brand, which began as a small neighbourhood eatery in Saladaeng. The menu is Japanese with a playful edge, including a fatboy roll and a ramen cacio e pepe, and the drinks include premium sake and signature highballs such as the O-Ren Ishi. The outdoor zone overlooks the Ploenchit BTS line.