Out of sight, out of mind.
Saru mono hibi ni utoshi.
to leave; to go away; to pass; to elapse; to be distant; to send away; to drive off; to divorce; ... completely; last ... (e.g. "last April")
every day; daily; day after day; days (e.g. good old days)
at (place, time); in; on; during; to (direction, state); toward; into; for (purpose); because of (reason); for; with; by; from; as (i.e. in the role of); per; in; for; a (e.g. "once a month"); and; in addition to; if; although
distant; estranged; disinterested; poorly informed; unfamiliar; ignorant