日本貨幣商協会とPCGS・NGCがダブルサイン認証システム「ICCC」を正式稼働。国内一次鑑定後に海外機関が電子署名を付与し、認証品は平均18.4%の高値プレミアムを記録。海外バイヤー参入促進と偽物排除強化の両立を目指す。
industry
May 2026: Japan Old Coins International Cross-Check System — Overseas Grading Agencies and Domestic Certification Bodies Implement Dual-Sign Authentication
Source: 日本貨幣商協会・ICCC推進委員会|Published: May 23, 202612d ago
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A reference when considering a sale or appraisal. All are dealers and auction houses with a proven track record.
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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.
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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.
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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.