Country Dictionary

ototo

It means literally: younger brother

Don´t talk with unknown people, ototo In Naruto series, Sasuke is Itachi´s ototo.

ototo-kun

"ototo" (オトト, 弟) is Japanese for "younger brother" "kun" (くん) is a Japanese suffix used to address a male, typically casual friends, family, or children.

Japanese: " 彼女のオトトくんは面白いです " Japanese (Romaji): "Kanojo no ototo-kun wa omoshiroidesu." English: "Her little brother is interesting"