In Osaka prefecture there are three groups of ancient tombs which have the Haniwa pottery figures as decorations, and these figure clays can be discriminated by their iron, rubidium, and strontium contents. X-ray fluorescence analysis, and calculation of Mahalanobis' generalized distances from the mother groups were used to identify their production kiln sites near these tombs, e.g. Shinike, Umemachi, and Furuichi kiln sites. This method was applied successfully to the Haniwa figures excavated from eight tombs in the above three groups, and their production kilns were identified except for a few figures of the Ninken emperor's tomb. -- AATA