楽観

N2 観測 kansoku observation N2 観念 kannen idea, notion; sense N2 娯楽 goraku pleasure, amusement, recreation N3 楽器 gakki musical instrument N3 観客 kankyaku audience, spectators N3 観光 kankou sightseeing, tourism N3 観察 kansatsu observation, survey, careful study N3 楽 raku comfort, ease, relief N3 〜観 kan view, outlook, perspective

N4 楽 gaku, raku, gou / tano.shii, tano.shimu, kono.mu music, comfort, ease N3 観 kan / mi.ru, shime.su outlook, look, appearance