Although as many as 31,795 or 30,240 of the Oban were minted, which was a large amount for Obans minted during the Edo Period, authentic ones are now a rare item.
鋳造枚数は31,795枚あるいは30,240枚と江戸時代の大判としては多いが、今日、真正品とされるものの現存数は非常に少なく稀少性が高い。