This has been a trend for awhile, most japanese music was only popular abroad due to piracy and they went to great lenghts to gatekeep it and geolock everything.
Even 15year old youtube clips of music videos have been taken down.
In the dawn of broadband internet and filesharing many artists gained notoriety and got to tour and sell worldwide because of this.
Now that we have all the tools the platforms and technology to legally reach these artists, their labels and industry chooses to geolock it making even harder to reach than it was in the early internet days, so now their music industry became stagnant and their artists stopped touring and selling abroad. Well done Japan.