This provoked the envy and wrath of the Ten Dai and the Shin Gon[1] teachers, who presented memorials to the Imperial court to protest against his propagandism of the new faith. Taking advantage of the protests, Ei-sai wrote a book entitled Ko-zen-go-koku-ron ('The Protection of the State by the Propagation of Zen'), and not only explained his own position, but exposed the ignorance 2 of the protestants. Thus at last his merit was appreciated by the Emperor Tsuchi-mikado (1199-1210), and he was promoted to So Jo, the highest rank in the Buddhist priesthood, together with the gift of a purple robe in 1206. Some time after this he went to the city of Kama-kura, the political centre, being invited by Sane-tomo, the Shogun, and laid the foundation of the so-called Kama-kura Zen, still prospering at the present moment.

2. The Introduction of the So-To School[3] of Zen.--Although the Rin Zai school was, as mentioned above, established by Ei-sai, yet he himself was not a pure Zen teacher, being a Ten Dai scholar as well as an experienced practiser of Mantra. The first establishment of Zen in its

[1. The Shin Gon or Mantra Sect is based on Mahavairocanabhi-sambodhi-sutra, Vajracekhara-sutra, and other Mantra-sutras. It was established in China by Vajrabodhi and his disciple Amoahavajra, who came from India in 720. Ku kai (774-835), well known as Ko Bo Dai Shi, went to China in 804, and received the transmission of the doctrine from Hwui Kwo (Kei-ka), a, disciple of Amoghavajra. In 806 he came back and propagated the faith almost all over the country. For the detail see 'A Short History of the Twelve Japanese Buddhist Sects' (chap. viii.), by Dr. Nanjo.

2 Sai-cho, the founder of the Japanese Ten Dai Sect, first learned the doctrine of the Northern School of Zen under Gyo-hyo (died in 797), and afterwards he pursued the study of the same faith under Siao Jan in China. Therefore to oppose the propagation of Zen is, for Ten Dai priests, as much as to oppose the founder of their own sect.

3 This school was started by Tsing-Yuen (Sei-gen), an eminent disciple of the Sixth Patriarch, and completed by Tsing Shan (To-zan).]