第1819話: 校長が追われている夢を見たため、忍者に調査を命じる

1819

The Headmaster dreams a lot of ninjas are after him and believing it will become true, he order the nintamas to investigate. In charge of the security of the Academy and in order to defend against intruders, 1st year Ha class follows Shouzaemon's suggestion to use passwords. (Source: Nintama Rantarou Wiki)