"Genchu saihisho" (Secret Notes of Suigensho) says that, 'Although Kumogakure comes next to Maboroshi, it does not exist at all and some old catalogues say it didn't exist in the first place, and even when asking many knowledgeable talented people about it, they don't know either.'
『原中最秘抄』には「雲隠は幻の次なり然に根本より此巻なし然ばふるき目録にも本よりなしとかきたり多の有識才翰の人々に尋申侍りしにも全分不二覚悟一」（一、二は返り点）とある。