Butō

is a technique of Gin Ichimaru's Bankai, Kamishini no Yari.

Description
By adopting a stance where he firmly grips Kamishini no Yari with both hands and places the Zanpakutō's hilt squarely to the center of his chest, Gin is able to unleash the tremendous extension and contraction properties of his Bankai to an even more terrifying extent than its normal state. This occurs in the form of a piercing maneuver where the extension and contraction of the blade becomes almost completely unseen to even the most-diligent of observers.

Trivia

 * In the original publication of Chapter 404, within Weekly Shōnen Jump, this technique was referred to as . However, in both Volume 46 and UNMASKED, the kanji "舞" is instead replaced by "無".