Katana: Katto Tyousai Tsunatoshi Zo
Ordering number : 13001
Katana in Shirasaya, with Koshirae (NBTHK Tokubetsu Hozon paper)
Signature:Katto Tyousai Tsunatoshi Zo
Tenpo 6 Nen 2 Gatsuhi(February 1835)
Shinshinto:Jyosaku ranking:Musashi province.
The blade was polished
Habaki :Gold single foiled habaki
Blade length : 75.75 cm or 29.82 inches.
Sori : 2.12 cm or 0.83 inches.
Mekugi : 1
Width at the hamachi : 3.38 cm or 1.33 inches.
Width at the Kissaki : 2.21 cm or 0.87 inches.
Kasane : 0.87 cm or 0.34 inches.
Era :Late Edo Era
Shape : The mihaba is wide kasane is thick with deep sori nice looking shape.
Jitetsu : Itame had well grained with jinie. Delicate chikei is seen.
Hamon : Nie based downside up chouji with gonome-madare. Active sunagashi, Kinsuji seen.
Special feature : Katou Cyousai Tsunatoshi is the third son of Katou Izuminokami Kunihide
He worked as a smith in Uesugi family, the owner of Dewa Yonezawa domain. Katou Tsunayoshi
Katou Tsunahide are his real brother. Both has studied douranba hamon and Bizenden by Suishinshi Masahide
Tsunahide leaves number of douranba pieces yet those are rather stern pieces and valued rather low quality
compared with Masahide. Some of his good pieces are BIzenden with gonome midair ha.
He has many students like koyama Munetsugu, Takahashi Naganobu and Seryuken Moritoshi and so on.
Especially he liked Seryuken Moritoshi personally.
His second generation Tsunatoshi went Suo province to study from Seryuken Moritoshi .
Both Tsunatoshi and Koyama munetsugu's hamon is very similar.
some differences are mentioned following. Koyama Munetsugu's boshi is midarekomi style，on the other hand Tsunatoshi's Gunome midair divided 2 prices clover style and round shaped hamon(70%)boshi hamon. This Tsunatoshi hamon is midarekomi boshi which is rare hamon.
The sword is wide and thick and long sword with healthy and good work.
Koshirae : Edo Bakumatsu(Late edo) koshirae
Tsuba : Elipse iron base stub with Kaou sign
Fuchikashira : Family crest delicately engraved in iron base.
Saya : black roiro saya
Menuki : Shakudo based with a picture of a shipping warrior engraved
Historical background: It is the start of the hectic bakumatsu era.
This Tenpo period is when most of the fine sword smith compete their skills with
one another. The swords made in Tenpo period are valued as most fine quality pieces.
NBTHK Tokubetsu Hozon paper
Aoi Art estimation paper : whole Oshigata.
Price (credit card) : JPY 1,500,000-.
Price (bank transfer) : JPY 1,470,000-. (Would you please pay bank transfer fee.)
(including shipping and 100% insurance fee)