Board Thread:Theories and Speculation/@comment-36300243-20180723092044/@comment-1512913-20180723093251

'Cept:
 * regardless of mask, Koji Kashin is still clearly younger than Jiraiya, Jiraiya had wrinkles, Koji does not
 * their hair are different
 * Jiraiya's personality was nothing like Koji's

But nice try.