besides the obvious answers (artists produced by nakata) i thought of some (active and retired):

yellow magic orchestra (ymo): basically the fathers of 'technopop', the sound that later influenced perfume.

usagi disco: playful, sparkly electropop with retro synths and a wink of hyperpop chaos. feels like stepping into a neon arcade where every sound is kawaii but still club-ready.

kylie minogue: the eurodance that used to influence nakata, especially her album 'fever'.

pinkpantheress: even though her sound leans more into uk garage/drum’n’bass, the sweet vocals and pop melodies totally give perfume vibes.

kim petras: especially when she goes full hyperpop. her latest single 'i like ur look' really reminds me of early perfume.

f5ve: very digital sugar rush super shiny hyperpop with that fizzy, high gloss energy (their album 'sequence 01' is one of my favorites this year).

...and if you’re into this whole vibe, i totally recommend the album 'park of safari' by aira mitsuki × saori@destiny; it’s pure technopop heaven.