This looks crazy easy, doesn’t it? I can’t wait to try it the next time I’m making mash potatoes. The video is Japanese but I think it’s pretty self explanatory.

From the description:

Make a line on the potato before boiling, and after boiling, put the potato into ice water for 10 seconds, and you should be able to peel the skin easily. You don’t need to worry about potato becoming cold or hard to be mashed. It remains hot enough to be processed after that.