They changed the system.
Karera wa sono seido o aratameta.
they (usually male); them
topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis
that (something or someone distant from the speaker, close to the listener; actions of the listener, or ideas expressed or understood by the listener); the; um...; er...; uh...
system; institution; organization; organisation
indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.
to change; to alter; to revise; to replace; to reform; to correct; to mend; to improve; to examine; to check; to inspect; to do properly; to do formally
Readings: ヒ、 かれ、 かの、 か.の
Meanings: he, that, the
Meanings: system, law, rule
Readings: ド、 ト、 タク、 たび、 -た.い
Meanings: degrees, occurrence, time, counter for occurrences, consider, attitude
Readings: カイ、 あらた.める、 あらた.まる
Meanings: reformation, change, modify, mend, renew, examine, inspect, search