The Sode no Shirayuki (袖白雪, Sode no Shirayuki) is a zanpakutō from the manga series BLEACH that was created by Tite Kubo. The series first began serialization in Shueisha's Weekly Shonen Jump in August 2001. Zangetsu first appeared in BLEACH Volume 1, CH. 1 "Strawberry & the Soul Reapers".
The zanpakutō (斬魄刀, zanpakutō) is the primary weapon of all Soul Reapers. All Soul Reapers are given a base asauchi (浅打ち, asauchi) to impart their soul onto through use and training.