Wellcome Trust Sanger Institute director Prof Mike Stratton said the results were "remarkable" and would "stand as a foundation stone for human biology for many years".
Japanese ambassador Keiichi Hayashi told those present the stone was a "symbol of human suffering during World War II and the ongoing quest for peace".
Rectangular niches of varying sizes carved into the surface contain ritual objects, Buddhas, deities, human and animal figures, and conic architectural shapes that may represent other temples (possibly the stele is a stone version of the painted maps depicting the Jain sites).