A recent theory has proposed that Kūkai (空海) was not the author of Benkenmitsu nikyōron (弁顕密二教論) based on the absence of this text in An’nen’s (安然) works. This paper cites passages from the Benkenmitsu nikyōron appearing in Kyōnichi’s (教日) Jubodaishinkai gishiki (授菩提心戒儀式) (Tenri Central Library), written in 871 within An’nen’s lifetime (841–915), therefore suggesting that the author of the text was Kūkai.