Shikantaza
In Zen Buddhism, Shikantaza (只管打坐) is the practice of "just sitting." It is Dōgen's Japanese translation of the Chinese phrase zhǐguǎn dǎzuò (只管打坐 / 祇管打坐). The phrase was used by Dōgen's teacher Rujing, a monk of the Caodong school of Chan Buddhism, to refer to the meditation practice called "silent illumination" (mozhao, Chinese: 默照), or "serene reflection," famously taught by the Caodong master Hongzhi Zhengjue (1091–1157).