Bottom left: eyeshadow quad 14, right: eyeshadow quad 4.
Inoui ID was a Japan-exclusive line, under the Shiseido corporation. The last artistic director was the incredibly talented Dick Page. The eyeshadow quads were particularly coveted; as fine as icing sugar, but nicely pigmented, in beautiful combinations.
It was sadly discontinued in 2007. I only have three items from the line; it was much harder to obtain Japan-exclusive lines even just a couple of years ago.
Sometimes, Inoui ID items do come up on Ebay and they are well worth keeping an eye out for. I hope that one day Shiseido reconsiders the decision and resurrects this lovely line.