
Sea of Japan coast wild-harvest produces iwagaki distinct from cultivated magaki in size and seasonality; specialty summer fine-dining ingredient.
Shell 10-15 cm; protein 8-10%; zinc 5-15 mg/100g; glutamate-rich umami profile.
Fine-dining summer sashimi, hospitality export, gift-economy retail.
Wild-harvest Japanese rock oyster (Crassostrea nippona) — the larger, summer-harvested counterpart to the cultivated 'magaki' (Pacific oyster, Crassostrea gigas). Distinguished by larger size (often 10-15 cm shell), creamier texture, and summer harvest (June – August) vs magaki winter harvest. Yamagata, Akita, and Niigata along the Sea of Japan coast host the principal commercial wild-harvest. Specialty fine-dining and gift-economy retail. Distinct from existing scallop / abalone / fugu / kuruma-prawn shellfish entries.
| 日本 | Food product; phytosanitary for live; shellfish-allergen |
|---|---|
| 欧盟 | Food import; shellfish-allergen labelling |
| 美国 | GRAS; FDA Prior Notice; shellfish-allergen labelling |
| 中国 | GACC; live-shellfish inspection |