Looking for wedding music from Arnold's wedding on "Happy Days"

For some reason, the music that was played during Arnold’s wedding on Happy Days has been in and out of my head occasionally for the last 20 or so years.

It sounded like traditional Japanese music (as far I could tell… it could have been traditional Japanese zucchini farming music and I wouldn’t know). It was just played on a simple stringed instrument, unaccompanied, and I believe the strings were plucked.

If I have to, I put up a .wav file somewhere of me “da da”-ing what I remember of the melody, but I hope it doesn’t come to that.

If there is any traditional Japanese wedding music I could be pointed towards, hopefully it will sound similar. Thanks!

I think it may have been a variation of the traditional “Cherry Blossoms”, which can be sampled here:

The melody isn’t exactly how I remember it, which of course could be because I heard it like 20 years ago, but I suspect more that it was a variation.