Just came across this post about barcode tombstones in Japan. Shows very clearly how much public acceptance the 2D barcode technology has got in Japan.
It allows visitors to the grave to access to the biography and photos of the deceased person and leave a personal message.
This concept probably takes some time to get used to, but you can see that it could clearly add some value for people visiting cemeteries. There is not much info you can fit on tombstone. A good example of providing ‘further information’ for people that are interested.