This is a six part series of short postings of a longer article viewable at this link: Insights to Humanity's "Nature Religions". These shorter periodic postings may make reviewing the article more time efficient for you.
The Ainu had no written language. Their stories were orally conveyed from generation to generation over thousands of years. Word of mouth was the only way in which their traditions were perpetuated.
They believed conversations between deities sounded like music. Therefore their stories were sung in epic poems called Yukar. Elderly women sang these stories to their grandchildren and thereby perpetuated the tradition of appreciation to, respect for, and admiration of the deities and of Nature.
For example, in their traditional lifestyle the Ainu gathered firewood by collecting dead tree trunks and dry twigs but seldom acquired them by cutting down living trees. They respected the river-god and never drained dirty or contaminated water into a river or washed in a river; for all water courses were considered sacred and therefore had to be kept pristine.