In addition, numerous pieces including documents relating to the statue's creation, items left by Chonen and Buddhist block prints were discovered within the abdomen of the statue and these have all been designated National Treasures along with the statue itself.
また、この像の胎内からは、造像にまつわる文書、奝然の遺品、仏教版画など多くの「納入品」が発見され、これらも像とともに国宝に指定されている。