訓 もの ・ 音 シャ
Sino-Vietnamese: giả
Its origin is murky, so remember it by function: 者 is the suffix that turns an activity into the person who does it — 医者 doctor, 学者 scholar.
Stroke data: KanjiVG (CC BY-SA 3.0) — kanjivg.tagaini.net
この本は若者に人気があります。 (このほんはわかものににんきがあります)
This book is popular among young people.