Chokutō

[7] The kantō-tachi (環頭大刀) is a Chinese style, characterized by a ring-shaped ornament shaped like a dragon or a phoenix on the tip of the handle.

[12] Chokutō typically come in hira-zukuri and kiriha-zukuri tsukurikomi (blade styles) which make them very distinct from later tachi and katana which rarely use these forms.

And as a weapon, it was completely replaced by the Japanese sword, which is known today for its deep and graceful curves.

According to tradition, the building of Ise Grand Shrine and its sacred treasures have been recreated to the same specifications every 20 years since the seventh century.

The Sugari no Ontachi was first described in the Kotai Jingu Gishikicho (皇太神宮儀式帳) compiled in 804, and it is believed that new decorations were added to the scabbard and sword fittings at each subsequent Shikinen Sengu (Rebuild every 20 years, 式年遷宮) to complete the design as we know it today.