2026年5月、国内外の主要鑑定機関が国際相互認証の枠組み構築に動き出した。日本の鑑定書が海外オークションでそのまま通用する時代が到来すれば、クロスボーダー取引の障壁が大幅に低下し、市場の国際化が加速する。
規制・制度
May 2026: Japanese Old Coins Certification Goes Global — International Mutual Authentication System Under Review
Source: ITTENDO Editorial|Published: May 23, 202611d ago
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#規制・制度
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Dealers Handling This Category
A reference when considering a sale or appraisal. All are dealers and auction houses with a proven track record.
Auction House
Ginza Coins
Ginza, Chuo-ku, Tokyo
One of Japan's most established numismatic dealers. The scale and variety of their regular auctions is among the largest in the country. Their catalogs are considered a benchmark for market pricing.
Auction House
Japan Coin Auction (JCA)
Tokyo
Holds regular auctions with reliable hammer price data, making it a useful resource for tracking market values. Caters to a wide range of collectors from beginners to advanced buyers.
Auction House
Taisei Coins
Tokyo
A dealer with an international network. Offers advanced services such as consignment to overseas auctions and NGC/PCGS grading submission. Recommended for high-value or internationally recognized coins.