also: にほんゆうせいこうしゃ
Refers to the state-owned postal corporation that existed from 2003 to 2007 before privatization into Japan Post Group.
Japan Post was privatized in 2007.
日本郵政 is the current holding company after privatization, while 日本郵政公社 refers specifically to the pre-2007 state corporation.
Standard kanji form. The reading にっぽんゆうせいこうしゃ is the most common pronunciation.
Alternate reading with にほん; less common but still used.
Compound of 日本 (Japan), 郵政 (postal administration), and 公社 (public corporation).