David,

Thank you very much for taking the time to listen and comment.
And many thanks for listening to the both versions.
I am really glad you like this tune, Kiana's vocal and my arrangement.

I really appreciate your detailed analysis and comments on my song.
This chord progression certainly appears in the Miyazaki film soundtrack.
Back in history, it has also been used in Aria"Magnificat"by G.P.Telemann, German composer in the Baroque period.
https://www.youtube.com/watch?v=0Wp8cyGttQ4

As for the tone of the oboe, I think the reason why it sounds like a harmonica is that the key is a little low for oboe in order to match the key of the vocalist.

I am always very encouraged by your kind words.

Best regards.

Shigeki Adachi