内ない向こう性せいMeaningsNoun1. introversionKanji used内inside向direction性nature (of a person)Pitch accentないこうせいComposed of内ない向こうintroversionNoun性せいnature (of a person); sex; gender; sex (i.e. sexual attraction, activity, etc.); -ty; -ity; -ness; -cyNoun