In the Chigasaki train station (Kanagawa Prefecture), the tune is from pop tunesmith legend Kuwata Keisuke. That is his hometown. (Been since 2014, evidently.)

https://www.youtube.com/watch?v=vrMeLLXifBY

I noticed the tune when passing through. Otherwise I wouldn't know where the dude is from.

Compare with:

https://www.youtube.com/watch?v=UK5xSs9jBlk