Reiatsu

is the physical force/pressure that a persons Reiryoku creates when released. Most Shinigami and Arrancar, even Quincies and Bount can manipulate their 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, 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.