Washin Bangkok is a Japanese restaurant on Sukhumvit 24 Alley in Khlong Tan, Khlong Toei, Bangkok, serving ramen, sushi and izakaya-style dishes. The ramen comes with a thick, rich tonkotsu broth, and the sushi includes a version made with cheese. The shop is small and warm, with a menu as varied as an izakaya's. Parking is available at the restaurant.