1º_ Although it is not used in Spanish, we know this suffix of Japanese social treatment, since it is used to address a male with whom we have a previous trust, or if he is younger than one and we can afford some condescension. The kanji spelling for kun is 21531; , and in the hiragana system is 12367; 12435; . See san ("Japanese honorific suffix"). 2º_ KUN is the IATA code for Kaunas Airport in the city of Karmelava (Lithuania).