Yes, even the japanese use caramel to colour their whiskies. As taste tests don't help to detect whether caramel has been added or not, the easiest way to find out is to check out the bottles sold in, for example, Germany or Denmark.
Regulations in these countries require caramel to be stated on the label/bottle/package as it is considered an additive to the whisky.
In most alcoholic beverages, including whisky, E150a is used and it's added after the whisky has been adjusted to bottling strength but prior to filtration.
Caramel fades rather fast in the bottle and if you keep a whisky in which caramel has been added in a sunlit window, the colour will most likely be gone within a week.
Most of the distilleries that use caramel prevent colourfading by using very dark bottles.
Here are some other whisky distilleries that uses caramel, E150 to colour their whiskies:
Isle Of Jura