Unfortunately, I couldn't find a lot of information on this singer Geeca but there has been a blurb about her being passed around on various websites such as the one for Tunecore Japan. I've translated it here:
Incorporating the melody and vocal essence of J-Pop from the 80s and 90s, Geeca creates music that also brings together elements of City Pop.
And that's really all she wrote. Still, whether listeners want to call it Neo-City Pop or J-R&B, her "Yarusenai Mind" (Inconsolable Mind) from October 2022 is pretty cool and soulful. In fact, I think that the song reminds me of some of the tunes that Momoe Shimano(嶋野百恵)was singing back in the late 1990s such as "baby baby, Service". If any of you folks out there have some more information on Geeca, please let us know.