I think it's AKIHIDE's sleeping patterns which in a way or 2 contribute to this ? I don't know haha
but yeah it's so not fair that everyone in the group can eat a great deal/amount of food but can never gain weight at all T_T
They usually tend to blog about food quite frequently (except for Aki) which makes things even 'worst' for me to handle
AKIHIDE's in fact even lighter than DAIGO so you can imagine D: . The fact that AKIHIDE's the shortest & lightest outta the trio , that's
something 
haha well , just force feed AKIHIDE lots of gorgonzola risotto , it's his fave food anyway xD
I rather be someone who's skinny but cannot gain weight as to me it's easy to put on weight but it's not easy losing it >_<