Reiatsu

is the physical force/pressure that a persons Reiryoku creates when released. Most Shinigami and Arrancar, even Quincies and Bount can manipulate the release of their spiritual pressure. 1st Division captain Shigekuni Yamamoto-Genryūsai used his spiritual pressure in the form of a stare to paralyze Nanao Ise. Yachiru Kusajishi, the Lieutenant of the 11th Division can emit her spiritual pressure into the form of a pink cat. The most powerful Shinigami such as Ichigo Kurosaki, Kenpachi Zaraki, Sōsuke Aizen, Commander-General Yamamoto, Byakuya Kuchiki, Rukia Kuchiki and others have vast amounts of Spiritual Energy, which they can emit in the form of Spiritual Pressure with devastating effects.