Shinkai received his Junior Zen Teacher certification from Daizan Roshi of Zenways Sangha in London in 2012. He received dharma transmission from Zen master Shinzan Miyamae of Gyokuryuji Temple in Gifu, Japan in 2017. Shinkai began his training with Shinzan Roshi and Daizan Roshi in 2004. He spent two years practicing at Bukkokuji Temple in Fukui, Japan under the Soto Zen Master Tangen Harada (1924-2018).
He received permission to teach Zen Jin Shin and Zen yoga from Daizan Roshi. Daizan inherited the Zen Jin Shin tradition through his Soto Zen lineage side. Shinkai learned Zen taiso during his time at Bukkokuji Temple and through the personal yoga and organ massage practice of Zen master Shinzan.
Currently on faculty at the University of Oregon’s PE mind-body department, Shinkai also teaches children’s yoga classes at Saraha Children’s School, one of the first Buddhist elementary schools in the country. He was the co-founder of the Edison Elementary Mindfulness Program for teachers/staff and leads retreats and teacher trainings state-wide as well as Zen Jin Shin workshops and Zen yoga/taiso classes.