This month, the Embassy of Japan will host a small exhibition with a rather poignant message.
After the major earthquake and subsequent tsunami in the Tohoku region of north-eastern Japan on 11 March 2011, power supplies, telephone land lines and mobile telephone networks were cut and internet access became impossible.
This made it extremely difficult for people to contact family and friends. The Japanese postal service - Japan Post - was, however, quickly up and running again. It was by postcard, in many cases, that people first heard that their loved ones were safe.