[kazinator]

That's the famous folk song "Sakura, Sakura".

https://en.wikipedia.org/wiki/Sakura_Sakura

[kazinator]

And, aha, here is likely why that station has that tune.

Komagome used to be called 染井村 (Somei Mura). It's supposedly the origin of that famous 染井吉野 (Somei-Yoshino) cherry tree.