第1837話: 六年生が到着し、ランタロウと友人たちが夜間パトロールのパスワードを設定する

1837

To stop the trespassers, Rantarou and the others decide on passwords and, two at a time, they go on a night patrol. Then, the 6th years arrive. Not knowing whether the 6th years are impostors or not, the Ha class check their identities using the passwords. (Source: Nintama Rantarou Wiki)