People enjoy Geocaching for many different reasons, but what junior cachers love most is finding large boxes filled with toys. And since regular sized caches are rare in Tokyo, I decided to hide one by myself and fill it with all the stuff that kids love. Of course, not only kids are allowed to trade items. ;-)
By the way, there is a very old Konara oak tree near GZ that is 19m tall and has a trunk circumference of 3.8m.