一般社団法人アジア古銭文化連携機構(ACCJ)が上海・ソウル・台北に共同研究センターを正式開設。日中韓台の研究者・コレクター・専門ディーラーが一体となり、真贋鑑定AIの共同開発・オークションデータの国際標準化・次世代コレクター育成を年間予算30億円規模で推進する三国共同プロジェクトが始動した。
Major Japanese Asian Regional Cooperation Organization Opens Joint Old Coin Culture Research Centers in Shanghai, Seoul, and Taipei — Trilateral Project Officially Launched with Annual Research Budget of 3 Billion Yen

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.
Free Appraisal
Get your old coins appraised — free of charge
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.
Request a free appraisalDealers
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.