Does anyone know who did the vocals for this track?

Ikasuze! Positive Thinking

So I was watching welcome to the nhk and I heard this track playing in the background. I am a big fan of Round Table Featuring Nino, and they did the opening for this show which is pretty much the reason why I started watching (I also heard the show is good). So when I heard this track in the background I was thinking, I’ve never heard this song, and I’ve heard a ton of songs by round table featuring Nino. I went on YouTube and looked at the ost for welcome to the nhk and found out that Pearl Brothers actually made this track. I’ve heard some stuff from them and I really like their stuff. But to get to the point I’m wondering if since they were both working on the welcome to the nhk soundtrack, did Nino do some vocals for Pearl brothers. Nino has a really distinct voice but I’ve never heard of her collabing with other bands. If anyone could help that would be much appreciated ❤️