I think the question would be who wasn't. (Ok maybe I'm exaggerating but there are several candidates)
To the top of my head it was Noctyx's 3D debuts recently,so they should have been on Japan. Then I know Elira, Millie and Enna were there recently too, Enna still being there I believe. I'm not sure about Hex/Kyrio, heard he might be going there soon or maybe he was already there? Then there's Petra (who's studying there) and Meloco and Kotoka who are japanese. No idea about Rosemi, Aia and Scarle have been streaming so hahaha no, and no idea about Luxiem, maybe Shu was there? I have no idea where that twinko lives
Those are all that come to my mind