lore of kamui.

This is not a accurate information.
Please read lightly.
　
神.

神 is God.

Pronunciation of ”神” from ancient of Japan.
It is "kami".(かみ)
　
By the way，神 is the Chinese character of course.
　
"Shin".（しん）
And there is also this pronunciation in 神 at Japan.

Perhaps there was "kami" first as a term for God.
(Of course，it would be different from the concept of God in the West.)　

And then Chinese characters came to Japan.
　
And probably、pronunciation of ”神”was ”Shin” as a word to describe the presence that transcends the human intellect.
　
Of course Japanese would read this Chinese characters as ”Shin”.
However，although I do not know its time clearly，Japanese began to read this Chinese characters also as "Kami".

Pronunciation of ancient Japan.
Pronunciation came from China.

The two were mixed in the Japan.

Therefore，how to read of several types are present in the Chinese characters at Japan.
There is no context for it.


・・・・・・・・・
　

Pronunciation of ancient Japan.
Well，I wrote so.　

Although passed away already.
There is a novelist named "Kimu Tarusu". (金達寿)
He is a Koreans in Japan.

"Bear comes out to myth of Korea.
This bear is also the incarnation of God.　
And Pronunciation of bear is "komu" in Korea."
(Incidentally bear is "kuma" in Japan.)　

　
By the way，"komu" is a representation by the Japanese style.
Pronunciation of formal Korean may be different.
　
Because，although I write in memory reliance,
Number of vowels.
It's most in the world is Korea.
(Vowel of modern Japan is 5.)
　
However，maybe when Japanese people at that time would try to pronounce of komu.
komu would became komu.
　
Although subtle differences would exist of course.
Also by era.