The Japanese Archaeological Association on Sunday concluded that none of the alleged stone tools that disgraced archaeologist Shinichi Fujimura said date back to the Paleolithic period have any academic value.

The decision by the association’s special investigative committee, announced at the group’s general assembly held in Tokyo, comes 19 months after the shocking revelation that Fujimura, once a star amateur archaeologist, fabricated his finds at what were claimed to be ancient ruins in northern Japan.

The association has since re-examined ruins that Fujimura, 52, a former deputy director of the Tohoku Paleolithic Institute, was involved in excavating.

A report submitted at Sunday’s meeting by the committee, headed by Meiji University professor Mitsunori Tozawa, said it is “impossible to use (Fujimura’s finds) as academic materials.”

The report provides a final academic conclusion to the scandal, which broke in November 2000, judging that Fujimura’s purported finds dating back to the Old Stone Age were bogus.

Some of his alleged major finds were once mentioned in school textbooks, but have been deleted since the scandal came to light.

According to the report, the committee re-examined the Kamitakamori ruins in the town of Tsukidate, Miyagi Prefecture — the scene of the first Fujimura fabrication that was exposed by the media — and excavated three stone tools at the site, which had been sealed since the scandal broke.

However, all of the three pieces turned out to be fabrications.

The committee also inspected the Zazaragi ruins, also in Miyagi Prefecture. Fujimura’s reported discoveries at the ruins had Japan’s archaeological world declaring that remnants from the earlier Paleolithic period — dating back more than 30,000 years — existed in Japan.

However, the layer from which Fujimura’s alleged finds were excavated was an accumulation of pyroclastic flow, which would have been uninhabitable for humans, the report said.

In addition, inspection of alleged finds from 10 other ruins excavated by Fujimura showed that stone tools supposedly discovered by Fujimura showed signs of having been scratched with a metal farm tool. Some of Fujimura’s stone tools turned out to be natural stones that simply resembled stone tools, the report said.

The once-acclaimed Fujimura confessed to fabricating his finds after a Mainichi Shimbun reporter caught him on videotape burying supposed artifacts at the Kamitakamori site.

Initially, he argued his finds were real except for those excavated at Kamitakamori and another site in Hokkaido. But he later admitted, through a probe by the archaeological association, that he had fabricated finds at 42 sites throughout the country.

According to the Cultural Affairs Agency, Fujimura is known to have taken part in the excavation of 186 sites in nine prefectures.

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