What are these? You see them on every sidewalk in Japan. These tenji-blocks are for the blind. Blind people with a white stick can walk on these releif blocks to know where the middle of the sidewalk is. In addition, many crosswalks feature a cuckoo like beep or even music when the walk changes green, to let the blind know when it's safe to cross. There are even public service announcements to warn young people not to park their bikes on the tenchi-blocks. What a thoughtful country. They're pretty useful when you're stumbling home drunk, too.