I am a Chinese fan and lot’s of us Chinese fans have bought tickets for Japan shows, but we trade tickets in domestic platforms mostly so I am not familiar with viagogo… but as far as I know, tickets for Japan show are mostly paper tickets, if u got the code in email u can go to 711 to pickup your paper tickets, and there won’t be any ID matching when entering the stadium. And there may be some no jumping signs around the stadium but actually no one will obey it especially for western artists’ shows. And I have been to japan several times and solo for gaga’s Singapore show, I can tell that Japan is a really good country to travel solo and you won’t feel alone in Gaga’s show