本人に直接聞いてみないと分からない

N3 本人 honnin the person himself N3 直接 chokusetsu direct, directly N5 ない nai there isn't, doesn't have N3 分 bu dividing, part, segment

N5 本 hon / moto book, present, main N5 人 jin, nin / hito, -ri, -to person, être humain, personne N3 直 choku, jiki, jika / tada.chini, nao.su, -nao.su, nao.ru, nao.ki, su.gu straightaway, honesty, frankness N2 接 setsu, shou / tsu.gu touch, contact, adjoin N5 聞 bun, mon / ki.ku, ki.koeru hear, ask, listen N3 分 bun, fun, bu / wa.keru, wa.ke, wa.kareru, wa.karu, wa.katsu part, minute of time, segment

N4 〜てみる te miru Indicates experimental attempt of an action, attaches to the te-form verb, means try doing to see the result N5 〜から kara Indicates cause or reason, equivalent to because or since, connects two clauses explaining reason N5 〜に ni Indicates destination, target, arrival point, specific time, or person receiving an action N5 〜と to Indicates company, quotation, natural condition, complete list, or direct connection between elements N5 〜か ka Marks a question, alternative, or uncertainty, appears at the sentence end or between options