This sword was made by Ittosai Masakiyo in February 1975.

Ittosai Masakiyo was born in 1911 and his real name was Kobayashi Kiyoharu. He entered the Toshin Seirensho Japanese sword factory in 1942 and was involved in the production of military swords for officers until the end of the war in 1945. The foundation of Tohshin Seirensho was a group of several sword smiths consisting of the students of Suishinshi Masahide in the old days. The swords he made had a very high reputation for their excellent cutting ability, even during wartime. He was a famous swordsmith for forging swords with a focus on cutting. After the war, he began to exhibit his work at the New Sword Exhibition in 1968, and from the tenth exhibition onward, he was selected for consecutive awards. He continued to pursue sharpness and beauty in the swords he made throughout his life, and passed away in May 1981.

The sword is in good condition, but it was used for test cutting and there are lines that show the traces of that use. There are no fatal kitae flaws. The jitetsu is itame and the deeply burned gunome blade hamon is very dynamic. Boshi has been returned to Komaru. Both the front and back are engraved with the Bohi grooves. Despite its 73 cm blade length, it weighs 1,070 grams without saya, making it an ideal sword for practicing iai.

Koshirae is equipped with a kuroro scabbard on a cotton tsukaito. A large Kuwagata-style Kojiri is attached to the saya end. The bird theme is featured on fuchikashira and menuki. The tsuba is iron round with a design of an ogre in the mountains. If you are looking for an iai sword that you can test cut, this is the sword for you.

• Blade length: 73.0 cm
• Curvature: 1.6 cm
• Number of Mekugi hole: 1
• Sakihaba: 21.8 mm
• Sakikasane: 4.0 mm
• Motohaba: 32.0 mm
• Motokasane: 5.7 mm
• Signature: Ittosai Masakiyo no Saku(front), Showa Gojunen Nigatsubi(back)
• Era: Gendai
• Structure: Shinogi-zukuri, Iori-mune
• Jitetsu: Itame
• Hamon: Gunome with Midare
• Boshi: Komaru
• Weight(without Saya): 1,070 g
• Nakago: Ubu
• Original Registration No.: Tokushima 19387