Ordering number : 13138
Katana in Koshirae (NBTHK Tokubetsu Hozon Paper)
Signature: Oite Touto Chounsai Tsunatoshi 66 Okina
Chounnsai Koretoshi Yaki no Bunkyu 3nen 8 gatsu hi (August 1863)
The blade was polished.
Habaki: Gold double foil habaki
Blade length : 79.5cm or 31.31inches.
Sori : 1.8 cm or 0.71inches.
Width at the hamachi : 3.2cm or 1.26inches.
Width at the Kissaki : 2.43cm or 0.96 inches.
Kasane : 0.93cm or 0.37 inches.
Weight of only blade:
Era: Late Edo Period
Shape : It has wide mIhaba of 3.2cm and the kissaki is long（７９.５cm）
It is magnificent looking katana.
Jitetsu : Koitame hada well grained with jinie attached.
It is beautiful Koitame hada.
Hamon : Nie based with Gonome and Choji mix
with split on the top part of the hamon.
This hamon is the characteristic of Tsunatoshi pieces.
Special feature : Chouunnsai Tsunatoshi is the third son of Katou Izuminokami Kunihide who was born in Yamagata. HIs brother was called Katou Tsunahide and he was famous for his Douranba Hamon.
Akama Tsunanobu, Chouunsai Tsunatoshi, Suishinshi Masahide and many other swordsmith has been challenging Douranba. Chouunsai Tsunatoshi has come out to Edo and has studied under Suishinshi Masahide, the most famous smith of that time. Right after, he has studied under Suzuki harukuni in Osaka and made swords in Kumamoto, Kyushu. Ansei 3rd year, he has given his name to his son Koretoshi and altered his signature as Chojyusai. Koyama Munetsugu, Takahashi Naganogu and Shouryuuken Moritoshi were some of many studentsstudied under Tsunatoshi. Especially, Seiuryuuken Moritoshi was very close student of him.Second generation Koretoshi has betake himself to Yamaguchi to study under Moritoshi. Tsunatoshi pass away in Bunkyuu 3rd year(1863).
This piece is typical Gonome mix with Choji hamon. The top part of the hamon is split in two parts. He makes similar pieces as his pupil Koyama Munetsugu but Munetsugu’s pieces does not involve split hamon on the upper side with mixture hamon.
It is rare to see such piece made by both father and son Gassakuto(made sword with father and son). It is precious data.
NBTHK Tokubetsu Hozon Paper
Aoi Art estimation paper : whole Oshigata.
Price (credit card) : JPY 1,800,000-.
Price (bank transfer) : JPY 1,764,000-. (Would you please pay bank transfer fee.)
(including shipping and 100% insurance fee)