Hyaku Ana | Michael John Grist The Hyaku Ana Cliff Tombs in Saitama are ancient, easily some of the oldest ruins in all of Japan, dating back 1300 years to a time of almost pre-history- such that very little is known about them at all. They were first discovered in 1888 and thought to be aboriginal homes, only being proved to be tombs after a research study in the 1920′s. A second layer of history was added in the Second World War when deep munitions tunnels were carved into the rock; gloomy storage spaces to keep serious weaponry safe from Allied bombing raids. Now the tunnels are well-lit and echo with the sound of clattering children chasing each other from end to end, the deeper recesses fenced off with metal portcullis walls.