In the spring of 1991, gold metal balls of unknown origin rained down from space. Despite their small size being undetectable by humans, they fell without causing any harm and were scattered all over the globe.
Added one-shot:
Zipang, a small island nation in the Pacific, was one of the few places where the mysterious golden orbs were found in significant quantities. As curiosity grew, scientists and researchers flocked to the remote island in search of answers. But little did they know, Zipang held a secret that would alter the course of human history forever.