I first discovered this band 5 or 6 years ago. Then forgot about them.

“Day By Day” with Yui on violin, Mariko on cello, Waka on flute, and Keiko on piano, although Emilee has apparently sat in for Waka at times.

It’s a catchy enough tune, kinda reminds me of the Corrs a little.

They did some more classical sounding pieces like this and this, and did a cover of Volare because apparently any non-rock band is required to play it, much like how federal law required all West Coast 70s bands to have Michael McDonald sing backup vocals on at least one track per album. Beatles covers work much the same way.

These pretty women* also included Roy Orbison in their cover catalog…

This one sounds like the intro to some late 60s/early 70s comedy-variety show –

And speaking of late 60s/early 70s American television –

* Hey, I don’t write the show, I just use what the program director gives me.