>>725091971
Because the PS5 has been very hard to get during its first two years, with foreigners heavily scalping the console due of the yen value (which is even lower now).
The console has also gotten more and more expensive over time too (PS Plus subscriptions too), now the base PS5 is sitting at 85k yen vs 36k yen for a Switch 1 or 50k for a Switch 2.
SIE has also removed Japan Studio out of spite against the Japanese, so Playstation has nothing of note as most third-parties are available on the Switch, a console that anybody can use as a home console and portable one.