This ultra-rare 1 Yen aluminum error coin from Heisei era 7 showcases a unique full brush stroke edge, making it a standout piece for serious numismatics collectors in Japan.

Error coins from this era are increasingly sought after due to their limited minting and distinctive characteristics that set them apart, often reflecting the craftsmanship of the period.

The current bid of ¥7,100 aligns with the growing interest in unique currency errors, which typically receive higher premiums in the collector market, demonstrating the piece's notable appeal for those focused on historical authentication and rarity.

As with Japanese collectibles, provenance and correct storage play crucial roles in maintaining value, making this a particularly desirable item.