Ruijumyōgishō is a Chinese-Japanese dictionary edited in the 'Insei' and 'Kamakura' eras. The original version of the dictionary is 'Gensenbon' and it offers a lot of instances of 'wakun' reading (the Japanese way of reading of Chinese characters) including what have been cited from Wamyōruijushō. The last mentioned is an older Chinese-Japanese dictionary edited in the middle 'Heian' era and it provides many examples of 'wakun' reading. An enlarged version of Ruijumyōgishō is called 'Kaihenbon' and it contains many instances of 'wakun' reading as well.
As to the editions of 'Kaihenbon' we have four versions, and one of these is 'Kanchiinbon' and this version contains some more instances of 'wakun' reading which were added after the completion of 'Kaihenbon'. In 'Kanchiinbon' we find also some examples of 'wakun' reading which are supposed to be cited directly from Wamyōruijushō.
Therefore it is possible to divide the whole instances of 'wakun' reading in this version into four groups: The first group were strictly cited from 'Gensenbon' while editing 'Kaihenbon', which had originally been taken from Wamyōruijushō. The second group are those which, while editing 'Kaihenbon', were taken from the explanations in 'Gensenbon', though the explanations in Chinese characters were modified into 'wakun' reading. The third group were taken directly from Wamyōruijushō while editing 'Kaihenbon'. The last group were also directly taken from Wamyōruijushō, and added in this version after the completion of 'Kaihenbon'. In this article I analyse and trace the instances of 'wakun' reading which appear in 'Gensenbon' and 'Kanchiinbon' as a representative of 'Kaihenbon', and I get to the above mentioned conclusion.