Yajirobe's katana is a powerful sword that is always seen on Yajirobe's person.
Yajirobe's katana is very sharp. It sliced through not only Vegeta's tail, but Vegeta's Battle Armor as well, which only the strongest energy blasts could pierce through. It is also capable to slicing right through a solid building with little effort. Yajirobe uses the sword at least four times in the anime and manga. The number of yellow diamonds on the sword handle is inconsistent from shot to shot in the anime.
Yajirobe uses his katana to cut off Great Ape Vegeta's tail, forcing the Saiyan back into his normal form. Shortly afterwards, Yajirobe used his katana to slice through Vegeta's Battle Armor after Goku had been defeated, to stop Vegeta pulling off Gohan's tail. The sword was later used by Krillin in an attempt to finish Vegeta off, but was stopped by Goku before he could.
In Dragon Ball: The Return of Son Goku and Friends!, Yajirobe's sword is seen slicing through rubble from a building.
In the anime "Future" Trunks Saga, Future Yajirobe is revealed to have survived thanks to Future Korin giving him the last Senzu Bean and continues to wield his sword (which was either repaired or was never broken) until he is killed by Infinite Zamasu.
Video Game Appearances
Yajirobe uses his katana to fight in the Budokai Tenkaichi series and other video games where he appears as a support-type character.
In Dragon Ball Z: Battle of Z, Yajirobe's sword is an item that increases melee attack power for one minute.