SWORD OF THE REAPER , VERY SHARP VERY HEAVY VERY DEADLY

Ichigo's zanpakutō is named Zangetsu.Unlike most Soul Reapers, who can seal their zanpakutō after releasing it, Ichigo's zanpakutō is always in its shikai form. Its sealed form is that of an ordinary zanpakutō, but oversized as a result of Ichigo's uncontrolled spiritual pressure.
Zangetsu is portrayed as wise and calm in most matters, and fond of testing Ichigo in unusual ways, many of which have a purpose completely contrary to the stated goal. Zangetsu's special ability is the Getsuga Tenshō., a wave of spirit particles released from his blade's edge. Correspondent to the name, the wave is shaped like a crescent moon.