Asahi Kasei
Cookper Microwave Fish Cooking Boxes for 1 Fillet, 4 per Pack, Set of 5 Packs
Cookper Microwave Fish Cooking Boxes for 1 Fillet, 4 per Pack, Set of 5 Packs
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Shipping & Delivery
Shipping & Delivery
Orders are generally processed within 2–5 business days (excluding weekends and Japanese public holidays) and shipped from Japan by air. Shipping availability and fees are shown at checkout.
After dispatch, estimated transit times are 5–15 business days for Asia/Oceania, 10–20 for North America, and 10–19 for Europe. Customs or local delivery conditions may cause delays. Estimated times are not guaranteed. Tracking is provided after dispatch.
Payment Method
Payment Method
Available payment methods may include supported credit cards, PayPal, Apple Pay, Google Pay, and Shop Pay. Options may vary by destination, device, or payment-provider eligibility and are shown at checkout.
Tax & Custom
Tax & Custom
Import duties, taxes (including VAT), customs-clearance charges, or other local fees may apply. Unless expressly stated otherwise at checkout, these charges are the recipient’s responsibility and are separate from the product price and shipping fee.
Customs clearance may affect delivery time. Please follow any customs or delivery instructions promptly.
Return & Refund
Return & Refund
We generally do not accept voluntary returns or exchanges for change of mind, accidental purchases, or personal preferences, except where required by applicable law.
For incorrect, damaged, defective, or non-conforming items, please contact us—preferably within 8 days of delivery—with your order details and photos where possible. Mandatory consumer rights, including applicable EU/EEA, UK, and Taiwan rights, remain unaffected.
Please contact us before sending any return.
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Asahi Kasei Cookper Microwave Fish Cooking Boxes for 1 Fillet, 4 per Pack, Set of 5 Packs
[Product Features]
• The built-in heating sheet lets you cook one fish fillet in a microwave
• The enclosed design helps contain splashes of fish and fat for easier microwave cleanup
• A silicone-coated heating sheet helps release fish with less breakage
• No fish grill is needed, making cleanup easier
• Each cooking box can be used up to twice consecutively, following the package directions
[How to Use]
• Assemble the cooking box as directed on the package, place the side you want browned against the heating sheet, then close the lid
• Place the cooking box on a heat-resistant plate and use the microwave's manual heating setting
• For one approximately 100g salted salmon or mackerel fillet, use approximately 2 minutes 30 seconds at 500W or 2 minutes at 600W; adjust for the fish and microwave
• If needed, continue heating in 10-second increments while checking until thoroughly cooked
• Use oven mitts to remove the cooking box together with the plate and take care around hot steam and fat
[Important Use Notes]
• Thaw frozen fish first and cut larger fish to fit within the heating sheet
• Do not use for fish containing roe or for fish roe
• For a second consecutive use, wipe away residue, use a fresh heat-resistant plate and reuse immediately without a break
• Allow the cooking box to cool before disposal and follow all instructions on the actual package
[Product Specifications]
• Contents per retail pack: 4 cooking boxes, each for one fish fillet
• Assembled size per cooking box: 20.8 x 9 x 3cm (L x W x H)
• Heating sheet size: 16.3 x 8.6cm
• Materials: Paper, aluminum-metallized polyester film and silicone resin
• Country of Origin: Japan
• Sales unit: Set of 5 retail packs, 20 cooking boxes in total; individual retail packs are not sold separately
About Asahi Kasei
Asahi Kasei Home Products offers practical essentials for everyday cooking and food preparation. Its Cookper (クックパー) range includes cooking sheets, frying-pan foil and onigiri wrapping sheets, with options for baking, steaming, pan cooking and food wrapping. Each product is designed for a specific task, helping you choose what suits your kitchen routine. Discover Asahi Kasei kitchen essentials at imy Shop Japan.