The number of children not attending school is increasing.
彼は中学時代に不登校を経験した。
He experienced school non-attendance during junior high school.
school refuser; truant; school absentee
Compound of 不 (fu, 'not') + 登校 (tōkō, 'attending school'). The term became widely used in Japan from the 1990s as a more neutral alternative to 登校拒否.