極きわめ書がき

noun

certificate of authenticity; appraisal certificate

A document certifying the authenticity, quality, or value of an item, especially in contexts like art, antiques, or swords.

• この刀かたなには極きわめ書がきが付ついている。

  This sword comes with a certificate of authenticity.

• 骨こっ董とう品ひんを買かうときは極きわめ書がきを確かく認にんしたほうがいい。

  When buying antiques, it's better to check the appraisal certificate.