日本古銭商協同組合が初公開した業界シェア統計2026年版で、上位10社が取引高の約72%を占める寡占構造が明らかに。デジタル特化型の新興3社がTOP10に初ランクインし、老舗中心だった勢力図が変化の転換点を迎えた。
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May 2026: Japanese Old Coin Market Oligopoly Shifts — Industry TOP10 Share Statistics Released, Three New Entrants Reshape the Power Map
Source: 日本古銭商協同組合「業界シェア統計2026年版」発表資料|Published: May 23, 202612d ago
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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.
Auction House
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.