It might be hard to find a lot of seafood-based ramen in Bangkok but hono shoyu ramen (B279) in this restaurant offers you different Japanese noodles just from their base soup. You might taste prawn, oyster and fish flavours in the soup while shoyu ramen (B229) still contains an original taste with a chicken-only base if seafood is not your style.
633 Sukhumvit Soi 103, Bang Chak. 098-287-3282. Mon-Tue 11am-8pm & Thu-Sun 11am-8pm. Closed Wed