Even in the Great Xia Nine Provinces, only various major forces can barely manage to mass-produce Beast Kings in order to produce certain Divine Objects and Spiritual Materials.
Fusang's obscure and apparently shady resistance organization...
One or two could be considered, but how can they even manage mass production?
Moreover... the location and timing of this beast tide appearance is too coincidental. It happened right during an unguarded gap in the Northern Marine Road, forcing Arasaka Koichi into a corner where he must heroically face death.
The timing was so precise that it coincided exactly with the attack on Hanyu Momoka, precisely forcing them to take action.
Of course, this can also be explained by the Shadow Ghosts deliberately timing it.
