Ordering number : 17538
Katana in Shirasaya with Koshirae(NBTHK Hozon Paper)
Signature : Oite Efu Kato Chounsai Tsunatoshi Tsukuru
Kaei 6 Nen 8 Gatsu Kichijitsu
(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.
The blade was polished.
Habaki : Gold foiled
Blade length : 69.7 cm or 27.44 inches.
Sori : 2.212cm or 0.87 inches.
Mekugi : 1
Width at the hamachi : 2.82cm or 1.11 inches.
Width at the Kissaki : 2.16 cm or 0.85 inches.
Era : Late Edo period. 1853.
Shape : Regular width and thickness Katana with large Sori.
There are engraving of Ken with dragon, Ume flower and bamboo.
Jigane : Ko-Itame Hada well grained. It is clear Jigane.
Hamon : Ko-Nie Deki, From Hamachi is Suguha and then tight Choji Midare.
The Ha is bright. Boshi is Midarekomi Hakikake shape.
Special feature: Chounsai Tsunatoshi the First forged this katana at Edo in 1846.
Born Kato Hachiro in Dewa province, present Yamagata pref. as the Third son of Izumi (No) Kami Kunihide in 1798,
learned under Suishinshi Masahide. Kato Tsunahide, known as its excellent Toran-ba hamon was Tsunatoshi’s elder brother.
Tsunahide moved to Osaka from Edo and learned under Suzuki Harukuni. After that Tsunahide went
to Kyushu Island and forged sword at Kumamoto. Around 1823, he lived a house of the Uesugi family
at Azabu in Edo. He passed away in 1863, aged 66.
Saya : brown color Ishime-Ji Saya.
Kojiri: Iron, dragon is engraved.
Tsuba : Iron Tsuba, dragon and cloud are engraved with gold color.
Menuki : Iron, dragon is engraved.
Fuchi Kashira: Iron, dragon is engraved.
From Aoi Art: That is a quite precious engraving which was done by Chounsai Tsunatoshi.
Chounsai Tsunatoshi and Koyama Munetsugu,
their Hamon is very simillar. The top of Tsunatoshi’s Hamon is separated two parts,
the Hamon of Boshi is Midarekomi style.
Munetsugu’s Hamon is in contradiction to him, the boshi is round, the Hamon is also rounded shape.
They are famous sword smiths and active in late Edo period.
The engraving of dragon, Ume tree and bamboo are marvellous.
We strongly recommend this sword for you.
NBTHK Hozon Paper
Aoi Art estimation paper : whole Oshigata.