JAXAと日本古貨幣協会が協定を締結し、準天頂衛星「みちびき」を活用した出土古銭オープンジオデータベース「OpenCoin GeoBase」を構築・公開へ。考古学・行政・業界の三者が共同運用し、品種出土分布と市場価格インデックスを連動させることで希少性評価の客観化を図る。
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JAXA Partners to Map Ancient Coin Excavation Sites — Archaeologists and Industry Launch OpenCoin GeoBase
Source: JAXA・日本古貨幣協会共同発表|Published: May 23, 202612d ago
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A reference when considering a sale or appraisal. All are dealers and auction houses with a proven track record.
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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.