Ordering number : 12513
Katana in Shirasaya with Koshirae.(NBTHK Hozon Paper)
Signature : Oite Naniwa Kato Chounsai Tsunatoshi
Kaei 3 Nen 8 Gatsu Kichijitsu
Shinshin to:Jyo saku ranking: Musashi
(We divide 4 sections for each sword as Saijyo saku,
Jyojyo saku Jyo saku and regular saku)
This sword belongs toJyo-Jyo saku ranking.
The blade was polished.
Habaki :copper with gold color single habaki.
Blade length : 70.7 cm or 27.83 inches.
Sori : 2.0 cm or 0.79 inches.
Mekugi : 1
Width at the hamachi : 2.81 cm or 1.11 inches.
Width at the Kissaki : 1.73 cm or inches.
Kasane : 0.69 cm or 0.272 inches.
Era : Late Edo period.
Shape : The blade is regular widthm thickness
with deep sori and regular kissaki size.
Jigane :Koitame hada well grained with jinie attach nice texture.
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 in Edo.
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.
Nioi deki cyoji midare hamon. Boshi:Midarekomi style.
Koshirae : Mogarashi issaku Koshirae.
Saya :black roiro saya.
Tsuba :On the round syape syakudo plate,
the mimi is cvered by rope shape gold color.
Menuki : On the syakudo plate, autmn flowers
and insects are engraved with gold color.
Fuchikashira: On the syakudo plate,
autumn flowers and insects are engraved with gold color.
From Aoi Art: This sword looks Koyama Munetsugu beautifut nice Cyoji midare and midarekomi style Boshi.
Koshirae is all matching Mino school and mogarashi style fittings.
Aoi Art estimation Paper and NBTHK Hozon Paper: whole Oshigata.