Masaki,
Do you know the weight of the binding that goes on one ski (not the pair, just one toe and heel and brake)?? If you use them for skinning, the weight makes a big difference on how quickly you will tire out. I thought I heard them say 1300 grams, not shure if that was a pair or single.
I have skied the Citadel ski you bought. It is very light and stiffens up when you ski it fast. It was nice in that regard. The ski I was on was a prototype and had some issues. In general I think they are very good skis. They will work well for skinning and for resort skiing in soft snow.