This is a rare and unique Japan Edo period coin from the year 1668. It features a denomination of 1 mon and is made of brass. The coin has circulated and is uncertified, but it holds a significant historical and cultural value. The KANEI-TSUHO coin was first minted in Kameido-sen, making it a sought-after collector's item for numismatists worldwide. Its intricate design and cultural significance make it an excellent addition to any coin collection, and its value is only set to increase over time.