postal system; postal administration
Refers to the overall postal service or postal administration, often used in compound terms like 郵政省 (Ministry of Posts and Telecommunications) or 郵政民営化 (postal privatization).
郵政民営化は大きな議論を呼んだ。
Postal privatization sparked major debate.
Efficiency improvements are being demanded in postal services.
Mail delivery used to be under the jurisdiction of the Ministry of Posts.