Ordering number: 22083
Katana in Shirasaya with Koshirae(NBTHK Tokubetsu Hozon Token)
Signature: Oite Efu Chounsai Tsunatoshi Tsukuru Kore
Kaei 7 Saai 3 Gatsu Kichijitsu
Shinshinto: Jyo saku: Musashi
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku Jyo saku and regular saku)
This sword belongs to Jyo Jyo saku ranking.
Habaki: Shakudo single habaki.
The blade is polished.
Blade length:71.3cm or 28.07inches.
Sori:2.0cm or 0.787inches.
Width at the hamachi:3.41cm or 1.34inches.
Width at the Kissaki:2.33cm or 0.92inches.
Kasane:0.82cm or 0.323inches.
The weight of the sword:925grams
Era: In March of Kaei 7, The Edo period
Shape: The blade is wide and thick with suitable sori
Jigane: Koitame hada well grained muji style Jigane
Hamon: Niedeki Gunome midare high and low. Boshi is midarekomi stle and turns back.
Special feature: Cyounsai Tsunatoshi The first generation was born in Ushu Yonezawa, the home country, and changed his name to Hachiro Kato Chounsai, later changing to Chounsai.
The younger brother of Tsunahide Kato, who passed away on December 5, 1898, the works of Toranba’s Tsuda Echizen no Morisuke and Kouyama Souji, etc. Tsunatoshi, the third son of Izuminokami Kunuhide, has many works with clove blades
like this one. He was the younger brother of Tsunahide KATO, who was a Yamagata Clan craftsman and a master of the Toran blade. Born in the 10th year of Kansei (1798). He is called Dewa, the home country, and the Uesugi family of the Yonezawa clan. He called himself Hachiro Kato, and also called himself Koretoshi.
He studied under Suishinko Masahide and called himself Chounsai. He moved to Edo and then went up to Osaka,
After studying under Harukuni Suzuki, he traveled around Saigoku and settled in Kumamoto. In the third year of Ansei (1856), he handed over Chounsai to his son Koretoshi, the
second Tsunatoshi. Changed his name to Chojusai. From around 1823, he lived in the residence of the Uesugi family in Azabu, Edo. He died in December 1863 at the age of 66. His nephew was Koreichi Ishido VII, and his disciples included Soji Kozan, Naganobu Takahashi, Moritoshi Seiryuken, and other outstanding disciples. He established a major school in Edo at the end of the Edo period. According to Bizen Den, it was said that he was stronger than the Suishinko family.
Tsuba: A circle shape iron tsuba, on the mimi, Matsuba style design is engraved by gold color.
Fuchikashira: On the syakudo nanako plate, a cow design is engraved with the gold color signature Haruaki.
Menuki: cow design is engraved with gold color
From Aoi Art: This blade is first Cyounsai Tsunatoshi gunome midare hamon. Koshirae is also nice we request this item for you.
NBTHK Tokubetsu Hozon Token paper
Aoi Art estimation paper: whole Oshigata by Ayaka Tsuruta