correct orthography

understanding, comprehension / appreciation

kyūjitai

perfection, infallibility, completeness

perfect, infallible, complete

the Japanese language

understand, comprehend / appreciate

law / measure, size

he / distal demonstrative, something far off removed from both speaker and listener: that / boyfriend

distal demonstrative, something far off removed from both speaker and listener: that, yon / particularly, male personal third person pronoun: he / by extension from he: boyfriend