Raden's the first member of the unnumbered HoloJP generations (DEV_IS), Re:Gloss, to push for 1 million subs with this endurance stream.
Her appeal to history, museum and traditional performance art is greatly helping expand the fanbase, and she's been collaborating externally with HimeHina and Nijisanji's Joe Rikiichi.
Also, the mushroom brainrot songs.
They're really popular in Japan.