User blog comment:Theluckysakura/Kuro Kiku/@comment-202.138.246.2-20100830130933

That "Kuro Kiku" represent pretty much the 'dark side' of Kiku/Japan himself, with his most(maybe) notable appearance was in a strip of China and Teenage Japan. Japan was wearing this black version of his uniform when he attacked China and left a scar on his back, thus starting Sino-Japanese War. That's why fans often refer the 'darker', colonialist side of Japan with this outfit.

Sorry for my horrible grammar ;_; I hope my terrible explanation doesn't cause misunderstanding among others.