Zanjutsu

Far from ordinary handiness with a blade, Zanjutsu is a codified school of combat drilled into every recruit from their first day at the Shin'ō Academy. Eleventh Division captain Kenpachi Zaraki counts it as his particular specialty. Plenty of fighters swing swords well without ever studying the form: Grimmjow Jaegerjaquez with his Arrancar blade, Uryū Ishida with the Seele Schneider, and Shūkurō Tsukishima with the Book of the End all demonstrate this. A real sword is not even mandatory to practice, since wooden ones suffice for sparring bouts.

The discipline branches into refined forms. At its core lies Kendō, the Way of the Sword, a modern art of Japanese swordsmanship in which Retsu Unohana stands without equal. Some released blades demand unusual training from their owners. Renji Abarai's Zabimaru turns into a segmented whip-sword upon entering Shikai, forcing him to master strikes whose angle stays concealed until the final instant, and he judges it the hardest of any lieutenant's weapon to command. Other Zanpakutō split into two swords at once. Shunsui Kyōraku fights with one such pair, Katen Kyōkotsu, while Jūshirō Ukitake handles the other, Sōgyo no Kotowari; both had to learn to swing a blade in either hand simultaneously. Ichigo Kurosaki commands the same twin-blade style once his true Zangetsu takes on its dual form.

Practicing the form is not the same as unlocking a sword's genuine power. Zanjutsu can coax a technique to the surface by instilling the correct state of mind, yet this only skims the blade's potential. A Zanpakutō is a living, sentient being whose spirit dwells in its master's inner world, and only that spirit can grant true mastery of its abilities. In such cases the sparring itself becomes the arena where the spirit passes on a new technique or gauges whether its wielder is worthy. Outsiders reached mastery through Shinigami tutelage all the same: Kenpachi received brief instruction in Kendō while Genryūsai Shigekuni Yamamoto looked on, and Kisuke Urahara tutored Ichigo for a short spell, though neither ever attended the academy.