N5
けっこう
Definition
splendid, nice, wonderful, delicious, sweet, sufficient, fine (in the sense of "I'm fine"), (by implication) no thank you, well enough, OK, tolerable, reasonably, fairly, tolerably, construction, architecture
N4
たしか
Definition
sure, certain, positive, definite, reliable, trustworthy, safe, sound, firm, accurate, correct, exact, If I'm not mistaken, If I remember correctly, If I remember rightly
N3
せいせき
Definition
results, record, grades, marks
N2
せいねんがっぴ
Definition
birth date
N1
くろじ
Definition
balance (figure) in the black