Sushi Masa is a Japanese sushi restaurant in a small alley near the BTS station in Ratchathewi, Bangkok, serving thick cuts of raw fish and sushi. The menu includes salmon and tuna sets, engawa and eel sushi, salmon tataki, and rolls, with a higher proportion of fish than rice. Sashimi is cut over one centimeter thick, the clear soup is refilled continuously, and a table bell is used to call staff. The dining space is small.