
Yamamoto wins and unleashes a Sword Beam which blows them back.
In this case, it's a battle of who can do this first. Head-Captain Yamamoto prepares to battle Captains Kyoraku Shunsui and Ukitake Jushiro. Played straight earlier in the Soul Society arc.Urahara's mod souls figure out that he has to resheathe his sword after every blast in order to recharge it, and they render him helpless by preventing him from doing so.
He's just showing off his iajutsu skills, right? Nope. An arrancar named Patros always sheathes his sword after using it to send out a blast of power.
Subverted in Bleach anime Episodes 136-137. Black Clover: Yami's spell Dark Cloaked Iai Slash which has him sheathe his sword while he condenses his Black Moon, then coating his sword in his Dark Magic and drawing it to attack. Many a mook has thought it used to protect his back at best, not seeing how it could be grabbed, drawn (one-handed) and ◊ and swung, in less than a second. Berserk: Guts' Dragonslayer is between six and seven feet long, a foot wide, and he carries it on his back. The Asterisk War: In Volume 6 (anime episode 2x12), Kirin Toudou uses an iaijutsu move combining sword and sheath straight out of Rurouni Kenshin to defeat a group of skeleton warriors summoned by Psycho for Hire Gustave Malraux, before knocking him unconscious with the blunt side of her katana.