Signature: Sanshu ju Tamamine Saku.
Heisei 2 nen 9 gatsu 4 niti (September 4th, 1990)
The blade was polished.
Blade length : 19.2 cm or 7.55 inches.
Sori : 0.0 cm or 0.0 inches.
Width at the hamachi : 2.18 cm or 0.85 inches.
Kasane : 0.43 cm or 0.16 inches.
Era : Late Edo period.
Shape : The Tanto is small size.
Jitetsu :Itame had well grained with jinie, chikei work.
Hamon : Niedeki suguha with sunagashi and kinsuji work.
Special feature : Tamamine is working at Kagawa prefecture.
He made specula sword technique mixed up different type of sword for making sword.
The blade looks like Shinshinto Yoshihiro style texture.