Ch'an Buddhist training involves sitting meditation (Zazen in Japanese) and walking meditation. For Dogen, zazen, or shikantaza, is the essence of Buddhist practice. Oppose to Eisai, he preached enlightenment by earnest sitting meditation (zazen). The word "zazen" meaning "seated meditation" or "sitting meditation" is also closely linked. Long periods of zazen may alternate with periods of kinhin (walking meditation). Activity revolves around zazen (meditation), study, and work. Very generally speaking, zazen practice is taught in one of three ways. Though stripped of rituals, Packer still found the practice of zazen to be useful. Zazen or a lecture follows before bed at 9 p.m. I immediately sought out more books and found instructions for sitting "zazen". At this point, the practitioner moves to one of the other two methods of zazen. By the mid-1960s he had formed a regular zazen group. Lenz was the producer for the rock band, Zazen. Zazen produced 31 albums in 13 years.