Tachi : Sanryu Masamine Saku No
Tachi in Shirasaya
Signature : Sanryu Masamine Saku No.
Heisei 7Nen 2 Gatsuhi.(the blade was made at 1995 Feb.)
Human National treasure.
The title (Ningen Kokuho) Showa 56th(1981-authrized)
(We divide 4 sections for each sword as Saijyo saku, Jyojyo saku
Jyo saku and regular saku)
This Masamine belongs to Saijyo saki ranking.
The blade was polished by high ranking polisher.
Blade length : 74cm or 29.13inches.
Sori : 3.8 cm or 1.5inches.
Mekugi : 1
Width at the hamachi :3.2 cm or 1.26inches.
Width at the Kissaki : 2.4 cm or 0.94inches.
Kasane : 0.79cm or 0.31inches.
Era : Gendai (modern times)period.
Shape : The blade is wide and thick with bo-hi is engraved
on both sides of the blade also nice deep sori and well balanced sword.
Jitetsu :Itame had well grained with jinie attach and chikei work.
Hamon : Koniedeki with thick nioikuchi gunome midare hamon.
In Hamon, there are many ash, sunagashi and kinsuji work.
Boshi is midarekomi style.
Special feature : Sumitani Masamine, born Sumitani Yoichiro in 1921 was a swordsmith in Ishikawa pref.
Major in mechanical engineering and graduated from Ritsumeikan university in Kyoto,
he entered the researce institute of Japanese sword on the campus in 1941 and learned under Sakurai Masayuki,
the Second son of a famous swordsmith Sakurai Masatsugu. After that he moved to Onomichi city in Hiroshima pref.
and learned forging and polishing sword at Kokoku Nihonto Tanren-Jo with his sworn brother Yokota Masamitsu.
In the postwar Japan, Masamine set up his own smithy named Sanryutei in 1956 and studied Bizen-den.
He forged special swords to dedicate the Ise-jingu shrine in 1964, 1966, 1969 and 1989.
He became a Mukansa-tosho and a judge of the annual sword-making competition held by NBTHK in 1966.
In pursuit of Bizen-den, he completed especially choji-midare hamon called Sumitani-Choji.
He also studied old iron manufacturing in Kamakura period and reproduced classical texture of jitetsu.
Masamine was designated one of a preservers of Important Intangible Cultural Assets,
popularly known as Living National Treasures in 1981. He passed away in 1998.
This blade is well balanced with nice shape and fantastic Jigane and also active hamon.
We strongly recommend this sword (national treasure) for you.
Aoi Art estimation paper : whole Oshigata.