From the Japanese Palworld twitter (nitter / twitter). “As announced in the official PlayStation “State of Play”, the PS5 version of Palworld was released today in 68 countries and regions around the world. In Japan, the release date has not yet been decided. We apologize to everyone in Japan who was looking forward to it, but all of our staff will do our best to deliver it to PS5 users as soon as possible, so we would appreciate your patience for a little while longer. We hope you will continue to support Palworld.”
But why not Japan? Oh, right.