atmospheres:
It was unclear to me which project he was referring to when he talked about needing to be very thin, he made it sound like something he was working on right now which would be Filter. I don't really understand why he would need to be exceptionally thin for that show given he's mostly covered up in big long coats and turtleneck sweaters. His weight has frequently fluctuated throughout his career, unfortunately he's not an ectomorph nor very tall so every little bit of weight gain shows immediately on him, especially on his face and neck, and he's the type that gains weight easily and must watch what he eats very carefully. If he wasn't an actor, especially in idol shows, it wouldn't matter. Personally, I found him most attractive in Winter Begonia when he was a bit heavier (the hairstyle wasn't the greatest but in some scenes from some angles it looked pretty cute).
I was wondering the same. The translation said something about "acting in a group recently," so I thought the same as you, Filter -- but why??? Go East may have needed the character to be thin for costumes, but that was over three moths ago. And he's supposed to be doing Under the Skin next, again, not a thinner character or costume character, IMO. It's baffling.
Winter Begonia was very nice! His weight does seem to fluctuate, which is shame, because he clearly enjoys eating, but I think he looks great in most of his appearances. There was one time where he might have a bit heavy, right before Winner is King, I think.
If he had time, and the inclination, he could go back to working out a little and then eat more. He just is looking a little too thin right now, IMO.