Japanese script "Ugetsu monogatari"

[Beat Frey]

I am looking for the original version of the script for Mizoguchi's movie
"Ugetsu monogatari" (1953), written by Kawaguchi Matsutaro and Yoda
Yoshikata. It is quite urgent, but I could not even find out yet if the
script has been published. Does anybody know the references and where the
text would be available (editor's address or university library, if
possible in Europe or Tokyo)? Many thanks in advance.
Beat