Katana in Shirasaya(NBTHK Tokubetsu Hozon paper)
Signature : Bakufushin Kawai Hisayuki 73 sai saku kore
Ou Suifu-han Hioki Nobuaki no jutan kokoni
Ansei 5 Uma nen 8 gatsu Kidoken Togasaki Tameshi-Ba
Explanation: Kawai Hisayuki made the blade at age of 73
for Hioki Nobuaki (the domain of Suifu)
Togasaki Kidoken tried to cut in August 1858.
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku
Jyo saku and regular saku)
This Bakufushin Kawai Hisayuki belongs to Jyojyosaku ranking.
The blade was polished.
Blade length : 79.09 cm or 31.13 inches.
Sori : 0.33 cm or 0.12 inches.
Mekugi : 1
Width at the hamachi : 3.47 cm or 1.36 inches.
Width at the Kissaki : 2.32 cm or 0.91 inches.
Kasane : 0.85 cm or 0.33 inches.
Era : Edo period.
Shape : Edo period Ansei period
Jitetsu :Itame hada with mixture of Mokme hada. It is well combined.
Hamon : Nie deki suguha with mixture of koashi attached. Nijyuha activity and Uchinoke is attached. Sunagashi and kinsujiwork is active.
Boshi is hakikake brush up style.
Special feature : Hisayuki Kawai was called Kametaro Kawai and lived in Edo Koishikawa as a student of the Hosokawa Masayoshi.
He was samurai of the Edo bakuhu .
Mito family’s samurai Heki Cyomei ordered the sword to Kawai Hisayuki and after that well known samurai Togasaki Kidoken who was a expert of the Shindo Munenryu tried cutting test.
The blade is huge and thick with suitable sori and longer kissaki nice looking shape.
The horimono(curving) is Ranma sukashi on both sides of the blade. I think this Horimono was curved later on.
NBTHK Hozon Paper
Aoi Art estimation paper : whole Oshigata.