Katana in Shirasaya with Koshirae (#32th Juyo Token)
Signature : Doshu Yasuoka Yoshizumi Haito
Kouka Hinoto Hituji Aki. Efu Jyu Sa Yukihide Kitae Kore.
(Owned by Doshu Yoshizumi Yasuoka as Haito.
The blade was forged at Edo (Efu) on 1847 by Sa Yukihide)
(We divide 4 sections for each sword as Saijo saku, Jojo saku, Jo saku and regular saku)
This sword belongs to Saijo saku ranking.
The blade is polished by top ranking polisher.
Habaki : Gold foiled double Habaki.
Blade length : 76.1 cm or 30.0 inches.
Sori : 1.4 cm or 0.55 inches.
Mekugi : 1
Width at the Hamachi : 3.12 cm or 1.23 inches.
Width at the Kissaki : 1.85 cm or 0.73 inches.
Kasane : 0.85 cm or 0.33 inches.
Era : Later Edo period (1847).
Shape : The blade is very long, standard balance for width and thickness with deep curve and long Kissaki nice looking shape.
Jigane : Masame-hada well grained with Jinie atatch and Chikei work.
Shinogiji : Masame-hada well grained.
Hamon : Niedeki Suguha with thick Nioikuchi Notare and Gunome Midare mixed and also Kuichigai Ha work bright clear Jigane.
In Hamon, Sunagashi and Kinsuji work.
Special feature : Sa Yukohide was born at Chikuzen province as adopted son of Ito Matabei Morishige.
He’ve succeeded Samonji the 39th generation by himelf and engraved the signature on the tang. At early Tenpo ages (around A.D.1830), he became the student of Shimizu Hisayoshi and studied many techniques.
Kouka 3rd (1846) at age 34, he moved to Tosa province by recommendation of Sekita Sanehiro.
At Bynkyu 2nd(1862), he returned to Edo again and worked for Tosa domain.
But he was obliged to return Tosa again because of the friction of Itagaki Taisuke.
He continued making sword until Meiji 3rd year and after that he closed his business.
He passed away Meiji 29th at age 75, his adopted son Ikuma attended his deathbed.
This sword is unusual Masame-hada with thick Nioikuchi Suguha Notare and Gunome active Hamon.
In Hamon, there are many Kinsuji, Sunagashi bright clear temper line.
Boshi is having deep Nioikuchi turning round shape wild feeling. I think this is very wonderful Sosyu style hamon.
Tsuba : Straw-rope pattern on rim, Tidal wave carved on round shape iron Tsuba.
Saya : Black Roiro Saya.
Fuchi : Mndarine orange (Tachibana) family crest carbed on Shakudo plate with striped pattern engraved.
Kashira : Made from horn.
Menuki : Rooster carved on Shakudo plate with gold color.
NBTHK #32th Juyo paper
Aoi Art estimation paper : whole Oshigata.