I'm always confused by the boys' popularity rankings in Japan. Generally i think Jaejoong's the most popular (almost everywhere in the world) but in Japan Yoochun seems to be a close second. However i remember there were times when i read somewhere that Junsu's actually #1 in Japan (thanks to his oyaji gags) ;_; well at least Yoochun totally owns this ranking
Most rankings have his name, so I guess he's really really popular among Japanese fans. But I do have to agree that the Japanese media loves Jaejoong. I think it's time we acknowledge his popularity, I've always thought Yoochun needs more love haha!