十分な睡眠が必要だ

N4 十分 juubun enough, sufficient, fully N3 睡眠 suimin sleep, rest N4 必要 hitsuyou necessary, need

N5 十 juu, jitsu, jutsu / too, to, so ten, dix, diez N3 分 bun, fun, bu / wa.keru, wa.ke, wa.kareru, wa.karu, wa.katsu part, minute of time, segment N1 睡 sui / nemu.ru, nemu.i drowsy, sleep, die N3 眠 min / nemu.ru, nemu.i sleep, die, sleepy N3 必 hitsu / kanara.zu invariably, certain, inevitable N3 要 you / i.ru, kaname need, main point, essence

N5 〜が ga Marks the grammatical subject, highlights new information, can also show slight contrast in some sentences