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Mail-order Japanese food compared by portion size, shelf life, suitability as a gift, and what reviews say.
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Oysters

Comparisons of Oysters within Seafood. Every product is checked on the same five points in the same order: quantity, storage, ingredients, gifting and reviews.

7 articles

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Photo of two opened shell-on oysters with the oyster meat visible in the shells (松島牡蠣屋 Shell-On Oysters 2kg, labeled 生食用 for raw consumption)
OystersMiyagi2026.10.21

松島牡蠣屋 Shell-On Oysters 2kg (Labeled for Raw Consumption) — Contents, Shelf Life & Reviews

Price ¥3–5k★4.49 (2,846)
Product photo of frozen Hiroshima fried oysters (kaki fry), 20 pieces. A serving example: 3 fried oysters on a black square plate lined with newspaper-print paper, with lemon and leafy greens (the lemon and leafy greens are not included with the product). A shop logo “山陰海の幸 いそはま本舗” is at top right, the text “カキフライ” (fried oysters) is at bottom left, and a red circle at bottom right reads “20個入り” (20 pieces)
OystersShimane2026.10.11

Frozen Hiroshima Fried Oysters (Kaki Fry) 20 Pieces — Contents, Storage & Reviews

Price ≤¥3k★4.71 (1,198)Noshi gift paper available
Featured image for Jumbo Hiroshima Oysters 2kg (for cooking). A close-up photo of a large shucked oyster being picked up with chopsticks in a clay-pot hot pot, with napa cabbage, long green onion, and carrot in the background (the vegetables are not included with the product). A shop logo “越前・若狭のさかな屋さん ますよね” is at top right. Text the shop placed in the image reads “広島産” (from Hiroshima), “ジャンボ” (jumbo), “牡蠣” (oyster), “メガ盛り” (mega serving), and “2kg” at bottom left, and a gold badge at bottom right reads “SHOP OF THE YEAR”, “海産物ジャンル賞” (Seafood Genre Award), and “楽天 2017” (Rakuten 2017). Below the photo: “*Awards and rankings shown are the seller's own claims.”
OystersFukui2026.10.11

Jumbo Hiroshima Oysters 2kg (For Cooking) — Contents, Shelf Life & Reviews

Price ¥10–20k★4.68 (7,230)Noshi gift paper available
Product photo of a large white shucked oyster held up with chopsticks over a clay-pot hot pot. The pot shows green onion, napa cabbage, carrot, tofu and oysters in the shell (the pot, vegetables, tofu and in-shell oysters are not included with the product), and a bag of frozen oysters appears at the lower right. Text the shop placed in the image: "クニヒロ Marine Box", "ONOMICHI 1957", "カキランキング 第1位" (Oyster Ranking No. 1), "特大ジャンボ" (extra-large jumbo), "広島県産 冷凍かき" (Hiroshima frozen oysters), "1kg". Below it: "*Awards and rankings shown are the seller's own claims."
OystersHiroshima2026.10.11

Hiroshima Frozen Oysters 1kg (for Cooking) — Contents, Storage & Reviews

★4.83 (2,883)
Featured image for Hiroshima Steamed Oysters 850g. On the left: "Mail-Order Gourmet Comparison", "Hiroshima Steamed Oysters", "850g｜Contents & Reviews", "クニヒロ Marine Box｜Hiroshima Steamed Oysters, Seafood". On the right, a styled photo of 3 steamed oysters on a white plate topped with an amber jelly-like sauce and a purple flower (sauce and flower are not included with the product). A red circle in the back reads "冷凍 1kg" (frozen, 1kg), a shop logo badge "ONOMICHI 1957 クニヒロ Marine Box" is in the top left, and text the shop placed in the image reads "広島県産 蒸し牡蠣" (Hiroshima steamed oysters) and "簡単調理で旨味たっぷり" (easy to cook, full of umami); a frozen package is shown at the bottom right
OystersHiroshima2026.09.26

Hiroshima Steamed Oysters 850g — Contents, Shelf Life & Reviews

★4.77 (934)
Featured image for Oki Iwagaki Haruka Rock Oysters, about 2kg. On the left: the kicker "Mail-Order Gourmet Comparison," the title "Oki Iwagaki Haruka" / "About 2kg (10-12 Pieces)," and the subhead "Shimakaze Seikatsu (島風生活。楽天市場店) | Frozen In-Shell Raw Iwagaki (Seafood)." On the right, the shop's product photo of in-shell iwagaki (rock oysters), with two opened oysters showing the meat and green sprigs placed among them. There is no text in the photo
OystersShimane2026.09.25

Oki Iwagaki Haruka Rock Oysters, About 2kg — Contents, Shelf Life & Reviews

★4.69 (631)
Featured image for Jumbo Hiroshima Oysters 1kg. On the left: the kicker "Mail-Order Gourmet Comparison," the title "Jumbo Hiroshima Oysters" / "1kg," and the subhead "Echizen Kani Shokunin Kouragumi (DENSHOKU) | Hiroshima Oysters, Shucked / Seafood." On the right, a photo of shucked Hiroshima oyster meat arranged on a bamboo tray lined with cedar leaves. Text the shop placed in the image reads: "Delivery Contents," "A full 1kg (about 26-35 pieces)," and "Each piece is individually quick-frozen for delivery, so you can thaw only what you need and cook it right away."
OystersFukui2026.09.25

Jumbo Hiroshima Oysters 1kg — Contents, Shelf Life & Reviews

★4.64 (19,849)Noshi gift paper available

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