Kazuo Morimoto made history in the early 1980s when he discovered a large Paleolithic site at Narita, north of Tokyo. Now his attention is balanced between digging up the past and preserving the future -- the future of a once-nomadic tribe in Siberia.

"Suddenly I became more interested in people than ancient artifacts," he explains, meeting in Ochanomizu close to Meiji University, where he studied archaeology some 25 years ago. "Now I am concerned with the living as well as the dead."

Kazuo is one of three curators at the Kazusa Museum at the end of the Aqua-line, the bridge that straddles Tokyo Bay, in Chiba Prefecture.