東京大学・産業技術総合研究所・民間スタートアップの三者共同チームが開発した自律走査ロボット「CoinBot α」が、銭貨10万枚を対象とした実証実験で94%の自動分類精度を達成。従来の人手仕分け比でコスト75%削減・処理速度40倍を実現し、博物館・オークションハウス・ディーラーへの実装展開が始まる。
May 2026: Robot Analysis Frontier for Japanese Old Coins — Autonomous Scanning Systems Achieve 94% Classification Accuracy on Large-Scale Coin Collections

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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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.