国内大手リーガルテック企業が古銭・貨幣コレクションを対象とした相続トラブル予防専門プラットフォームを発表。AI遺言書ドラフトと古銭鑑定士・司法書士・税理士を統合したワンストップ相談窓口がローンチ6週間で月間3万件を突破し、古銭相続領域で業界最大規模に成長している。
Major Japanese LegalTech Firm Launches Coin Inheritance Dispute Prevention Platform — AI Will Drafting Integrated with Expert Consultation, Reaching 30,000 Monthly Cases

ITTENDO tracks auction records and market charts so you always know the current value of Japanese antique coins. Add coins to your Vault to stay on top of price changes.
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Edo-era silver, koban, commemorative medals, foreign coins and more — just upload a photo. Our specialists reply with an estimated valuation by email within 2–3 business days.
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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.