Isomaru Suisan, the seafood izakaya chain known for its live shellfish and tableside grilling, is introducing a new grand menu on Wednesday, April 1, 2026 at all locations across Japan. Locations in Hokkaido, Ishikawa, Nagano, Hiroshima, Fukuoka, and Kagoshima prefectures will begin serving the updated menu from Tuesday, April 7.
For details, see the official announcement: https://isomaru.jp/news/3272/
Top Pick: Boat Platter (Funazukuri)
The highlight of the new menu is the Boat Platter — a lavishly presented seafood spread perfect for group dining.
Boat Platter: ¥2,399 (tax included: ¥2,639)
New Oshi-Zushi (Pressed Sushi) Lineup
A variety of pressed sushi options have been added, each showcasing different flavors and regional inspirations.
Shima Sushi (Island Sushi) — ¥499 (tax included: ¥549)
White fish and tuna marinated in soy sauce, eaten with karashi mustard in the tradition of island home cooking.
Unagi (Eel) — ¥599 (tax included: ¥659)
Fluffy, fragrant grilled eel paired with gently pressed shari rice for a melt-in-your-mouth texture.
Salmon and Ikura (Salmon and Salmon Roe) — ¥599 (tax included: ¥659)
A rich and indulgent combination of salmon and salmon roe pressed together.
Shime Saba (Cured Mackerel) — ¥499 (tax included: ¥549)
Packed with the deep, concentrated flavor of mackerel.
Negitoro (Minced Tuna with Green Onion) — ¥499 (tax included: ¥549)
A luxurious pressed sushi brimming with the sweetness and umami of negitoro.
Isomaru's Garlic Toast
A new bread item joins the menu: Isomaru's Garlic Toast, described as crispy on the outside and chewy on the inside, with rich garlic butter and the chain's signature crab miso flavor soaking through each piece. It's also recommended to dip the toast in the popular Kani Miso Kabayaki (crab miso shell-grilled) for an extra savory punch.
- 2 pieces: ¥399 (tax included: ¥439)
- 4 pieces: ¥699 (tax included: ¥769)
New Silver-Tray (Gin Sara) Additions
Several new dishes have been added to the restaurant's signature silver-tray lineup:
Domestic Sardine Oil Sardine — ¥599 (tax included: ¥659)
Served piping hot in an ajillo-style preparation.
Squid Shumai (Ika Shumai) — ¥299 (tax included: ¥329)
Light and fluffy in texture, best enjoyed with karashi mustard and ponzu.
Kamage Shirasu and Green Onion Salad — ¥699 (tax included: ¥769)
A salad topped with plenty of boiled whitebait (shirasu).
Buri Daikon Ni (Yellowtail and Daikon Simmered Dish) — ¥599 (tax included: ¥659)
Fatty yellowtail simmered together with daikon radish in a dish that pairs well with both drinks and rice.
Menu contents may vary depending on ingredient availability. Domestic rice is used throughout. Images are for illustrative purposes only.
Official App
An official app for Isomaru Suisan launched in February 2026. Download bonuses include a free octopus sausage (5 pieces), with an additional free snack on the next visit. Rank-up rewards include a complimentary drink coupon. The app is available for both iPhone and Android.
