Japan Coin Appraisal Institute (JCAI), a major domestic third-party inspection body, has become the industry's first to obtain ISO/IEC 17025 international accreditation for ancient coin authenticity assessment and grade evaluation. The certification means JCAI-issued appraisal certificates will be accepted as 'international passports' by major overseas auction houses and financial institutions, expected to significantly boost trust and liquidity for Japanese coins in global trading.
Major Japanese Testing Institution Achieves ISO International Certification for Ancient Coin Authenticity Assessment — Industry First Accreditation Dramatically Boosts Trust of Japanese Coins in Global Markets

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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.
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.
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.
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.