Japan Post was a Japanese statutory corporation that existed from 2003 to 2007, offering postal and package delivery services, banking services, and life insurance. It is the nation's largest employer, with over 400,000 employees, and runs 24,700 post offices throughout Japan. One third of all Japanese government employees work for Japan Post. As of 2005, the President of the company was Masaharu Ikuta, formerly Chairman of Mitsui O.S.K. Lines Ltd.

Postal savings systems provide depositors who do not have access to banks a safe and convenient method to save money. Many nations have operated banking systems involving post offices to promote saving money among the poor.