Last week I went to see the largest Buddha statue in Japan at Nihon Temple, Nokogiri Mountain. It seems that many statues claim this title by tricky use of words. This may be the largest sitting Buddha made out of stone. And even that may not be accurate. It might be the largest sitting statue made out of stone that is considered an ancient Buddha, and not one of those modern ones that was probably made to attract tourists.
Whatever it actually is it was still impressive at 31 metres in height.