Thanx Kowal again for the answer. The only place I've found where I can buy japanese buttons is starcab. The problem is that they have only some models and colors and very limited stock in general. That's why I was asking. I've never tried japanese buttons, but since many people are saying good things about them, I'm curious. Anyway, I think I'll have to buy concave western-type buttons again, but with cherry microswitches now. They're reliable and I've never had problems of them being slow, unconfortable or getting stuck, etc.