AI Appraisal Estimate

This is a standard Japanese 10 Yen coin, a circular legal tender piece composed primarily of bronze (95% copper, 3-4% zinc, and 1-2% tin). The obverse side shown in the image features a detailed relief of the Ho-o-do (Phoenix Hall) of Byodo-in Temple in Uji, Kyoto. Below the temple imagery, the denomination '10 Yen' is written in kanji (十円), flanked by an evergreen laurel wreath. Above the temple, the text 'Nippon-koku' (State of Japan) is displayed in kanji. The coin has a smooth edge and a diameter of 23.5mm with a weight of 4.5 grams. This specific specimen exhibits a darkened, chocolate-brown patina consistent with oxidation of the copper content over several decades of circulation. Notable condition issues include surface dirt, minor contact marks (bag marks), and flattened high-point relief on the temple roof due to wear. The lack of reeding on the edge suggests it is a post-1959 issue, as earlier versions (1951-1958) had serrated edges. The craftsmanship is typical of the Japan Mint's high-volume industrial production, showing clean strikes despite the apparent surface grime. This item is a common piece of modern numismatics, representative of Shōwa or Heisei era Japanese currency.

Based on my visual examination of this Japanese 10 Yen bronze coin, I have determined it is a standard circulation issue produced by the Japan Mint. The coin possesses the characteristic smooth edge introduced in 1959, distinguishing it from the earlier 'Giza-ju' serrated versions. My assessment of the condition reveals it to be in Very Fine (VF) to Extra Fine (EF) circulated condition. The central Phoenix Hall (Byodo-in) maintains clear structural lines, though high-point flattening is visible on the roof ridges. The chocolate-brown patina is a natural result of copper oxidation over decades, and while surface grime is present, there are no signs of harsh cleaning or major environmental damage. From a numismatic standpoint, this is a high-mintage, common-date specimen. Comparable sales for circulated modern 10 Yen coins typically yield very little over their face value (approx. 0.07 USD) unless they are in Mint State (MS65+) or carry a rare error. In-person examination would be required to verify the exact weight (4.5g) and metallic composition to rule out contemporary counterfeits, though the low face value makes forgeries unlikely. Professional grading by PCGS or NGC would only be recommended if a specific rare year (such as Showa 33) were identified. Without seeing the reverse mintage date, this appraisal assumes a common year. Direct inspection under 10x magnification is necessary to identify micro-variations or die-clashes that could slightly fluctuate the value.