この本は「無益な殺生をしてはならない」という仏教の教えに基づいており, 「自然に敬意を払う」というエコロジカルな呼びかけが 骨子となっている。

(This book appeals ecologically to the importance of our respect for nature , based on the teaching of Buddhism:“We must try to live without causing unnecessary harm, not just to fellow humans but to all beings")

MEMOIRS OF THE HIROSHIMA-DENKI INSTITUTE AND THE HIROSHIMA JUNIOR COLLEGE OF AUTOMOTIVE ENGINEERING Vol.10(1977), Vol.11(1978), Vol.12(1979), Vol.13(1980)

Zen Master Keizan started teaching at Daijo-ji Temple January 12, 1300.

His disciples recorded and collected them. This is called Denko-Roku which consists of 53 chapters. This book tells the thread of teacher-disciple identification from Shakamuni Buddha(India) to Ejo(Japan) clearly (28 Indian patriarchs, 23 Chinese patriarchs  and 2 Japanese patriarchs) , putting the concatenation  of cause and effect of each patriarch's enlightenment first. This English translation can be found in chapters 1 〜 20.