This blade was signed by Bitchu no Kami Tachibana Yasuhiro(備中守橘康広). Yasuhiro was active in sword-forging during the Kanbun (1661-1673: Early Edo Period). Yasuhiro belonged to a prestigious sword school called Kishu Ishido and Osaka Ishido School.
Ishido School
His father, Tosa Shogen Tachibana Yasuhiro(土佐将監橘康廣), was born in Omi province, located in Shiga prefecture. And he belonged to Omi Ishido school during the early Edo period. Ishido school was initially founded by Sukenaga, an offspring of Ichimonji Sukemune, who made Fukuoka Ichimonji school in Bizen province(Today’s Okayama prefecture). During 1492-1501(Late Muromachi period), Sukenaga and his school moved from Bizen province to Omi province after being summoned by Gamou family, a powerful feudal line in that region. Sukenaga started to live in front of Ishido temple, and he changed his surname to Ishido.
Kishu& Osaka Ishido School
As of the early Edo period, many Ishido swordsmiths moved to other parts of Japan, looking for better opportunities. There are four areas: Edo, Osaka, Kishu(Wakayama prefecture), and Chikuzen(Fukuoka prefecture). Omi Ishido school is the origin of whole other Ishido branches that flourished during the Edo period.
Following this trend, Yasuhiro’s father, who belonged to Omi Ishido school, moved from Omi province to Kishu province. It is said that the father was the founder of Kishu Ishido school and played an essential role in making this school prosperous.
Yasuhiro was born as the son of the head of Kishu Ishido school. And he mastered excellent sword forging techniques from his father. And it is said that Yasuhiro served Tokugawa Yorinobu, the first head of Kishu domain, who was the 10th son of Tokugawa Ieyasu. Yasuhiro exclusively forged swords for Kishu domain for many years.
Later in his career, Yasuhiro received the honorable title “Bitchu no Kami” in 1657 and moved to Settsu city in Osaka to spread the tradition of Ishido school. He built the foundation of Osaka Sekido school. Yasuhiro is known as one of the most prominent figures that made Osaka Isido school prosperous during the early Edo period.
Osaka city flourished as a castle town and became the business center during the early Edo period. Many swordsmiths moved to Osaka to look for better opportunities. They not only forged swords for those Samurai who lived in Osaka but also for feudal lords nationwide. Among many swordsmiths active in the same period as Yasuhiro, he was one of the most famous figures in Osaka Ishido school.
This blade is appraised as a Tokubetsu Hozon Token(特別保存刀剣) issued by NBTHK(Nihon Bijutsu Touken Hozon Kyokai:日本美術刀剣保存協会).
Fuchi-Kashira
This Fuchi Kashira has golden color; it makes an ornamental look for the handle part. This coloring matches well with the Tsukamaki thread.
Tsuka and Menuki
The Kamakiri (蟷螂, mantis) is the motif of this Menuki. Same as the Fuchi Kashira, this Menuki is also colored with golden paint. The mantis is also called “Ogami-Mushi (拝み虫),” or “Inori-Mushi (祈り虫)” in Japanese. Both of these names mean a praying insect. Mantises hold their arms together, and their long wings cover their lower bodies. As this posture looks like a priest who prays to God, the mantis is likened to a “praying mantis.” Mantises lay well. Therefore mantis is considered a symbol of children.
Tsuba and Habaki
Yotsu-Mokkou-shaped Tsuba that has Kozuka and Kougai holes. The Mokkou shape, its origin is a shape of eggs. When a quince (it is written 木瓜 in Japanese) is cut into round slices, its cross-section looks similar to this shape; therefore, it was named as the Mokkougata (木瓜形) Tsuba. Yotsu-Mokkougata (四ツ木瓜形, a combination of four Mokkou shapes) Tsuba is often seen as you see in this work. The scenery of the moonlit night is depicted for this Tsuba. Since ancient times, the sun and the moon have been treated as objects of worship. Some people considered them the symbol of authority. The moon pattern has various shapes depending on the waxing and waning of the moon: full moon, half-moon, crescent, or hazy moon. There is also the idea: as the moon changes its shape depending on its fullness, it represents growth and development.
Authentication Paper
They authenticated the blade on March 15th in the 30th year of Heisei (2018). They appraised it as Tokubetsu Hozon Touken, the blade especially worth preserving for Japanese society.