There was a Japanese shop in 2nd or 3rd floor (or even maybe 4th?) of Delphi Orchard - a shopping mall where Muddy Murphy Irish pub is, opposite Orchard Tower. It has various Japanese clothes, range from traditional (yes, it has kimono, because the lady tried to sell one to me) to contemporary clothes, linens, handkerchiefs, apron, and anything else made from fabric.
However, I am not sure whether it is still exist. I visited it six years ago!

Just thought you wanna check it if you are desperate..