Tokyo Christmas Illuminations, Caretta Shiodome Bell of Spirits

One of my favorite places for the winter illuminations in Tokyo is Caretta Shiodome, which this year offers, besides a spectacular light and sound show, an interactive illumination called "Blue Forest of Spirits".

As you can see in the photo, it is indeed a forest of LED lights, in which the visitors are invited to ring a bell (the "Bell of Spirits") and the lights on eight surrounding walls are responding according to how the bell was rung...