KakuRenbo was suggested to me by a friend, and I have to say, I loved it. I did some research into it and found out the main purpose of why it was made. I have to say, that's a pretty creepy movie.
KakuRenbo "Hide and Seek" is an anime short film directed by Shuuhei Morita.
This movie's plot was created to point out that Tokyo is losing it's natural aesthetic, including childhood games such as hide and seek, tag etc., in order to progress industrial things i.e. the lighting of the city Tokyo, which costs the innocence of childhood games.
I honestly did love this movie, it's my new favorite. I love how they made it that once the child's been taken, their organs are used to light up the town until they die of starvation. And they have to keep doing this over and over again because it doesn't last long. Once the kid has been taken, the child is "it" (or "oni") and they're playing hide and seek again and again and again and again.
I recommend this to any anime fan who loves a creepy movie