Yamashiro family katana

"He was a great Samurai. I built him the strongest and most formidable armor in all of Japan. Forged him a sword fit for an Emperor."

- Ichiro Yamashiro on creating the katana for his son, Oda

A katana sword, created by Ichiro Yamashiro back in the times of mid-17th century Japan, has been passed throughout generations of Yamashiro family, eventually ending up in the hands of Ichiro's descendant, Maseo Yamashiro, who passed the sword to his wife, Tatsu. Tatsu then used the katana in honor of her late husband as the guardian of Lotus in Kyushu.

History
The sword was crafted by Ichiro Yamashiro for his son, Oda Yamashiro, along with a suit of armor, for his service as a Samurai in the guard of Shogun Tokugawa Iemitsu. Iemitsu grew jealous towards the young Samurai's popularity with the men who served under him, so much did the Shogun resent him for it, that. So he ordered Oda to commit seppuku. The sword was then left with old Ichiro, having no worthy wielder. The katana eventually found its use when the time travelers known as the Legends assisted the Yamashiro family's village with defense against the Shogun's troops. The sword was used consecutively by Ray Palmer, Masako Yamashiro and Nate Heywood to defeat the Shogun.

While Masako initially wanted Nate to take the weapon, as a worthy owner, he declined, that she proved her own worthiness in swordsmanship, and the village would still need a protector after the Legends were to leave. The sword was thus left with Masako, before passing through generations of the Yamashiro family after her. It was eventually stored in Yamashiros' apartment in Hong Kong, China. The sword was used by Maseo Yamashiro in his missions for A.R.G.U.S., before he abandoned it, along with his family, taking on the name Sarab as part of the League of Assassins, using Assassin weaponry in his new identity. His wife, Tatsu Yamashiro, took on his weapon, and used it in her masked alter-ego. Armed with the katana, Tatsu ended up killing her husband in a massive duel between Team Arrow and the League of Assassins, as he died in her arms, refusing to denounce his League affiliation. Tatsu then used the katana in honor of her late husband as the guardian of Lotus in Kyushu.