It's called "Furiko" (or "Pendulum"), and it was recently featured on Japanese variety show. It's only three minutes long, and it's making people all weepy.

The anime was drawn by the Japanese comedian Tekken, who named himself after the fighting game.

It did not bring me to tears, because I have no heart. Obviously. You?

鉄拳 振り子 [YouTube via 2ch]