If you're unfamiliar with Japanese characters, consult a hiragana chart while entering a password. Enter any of the following passwords after selecting the middle option (password) on the main menu.
Effect
Password
Level 2
a sa tsu ki
Level 3
hi me mo mo
Level 4
wa ta nu ki
Level 5
u tsu se mi
Level 6
ka ta shi ro
Level 7
u ma o I
Level 8
se ki re I
Level 9
ya ya sa mu
View Ending
Go to password screen (middle option on start screen). Enter password in Japanese. Note: Only works on Japanese version.