The following is the history of Japan Post from its establishment to today.
| April 20, 1871 |
- Modern Postal Service Introduced
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| January 1, 1875 |
- Government mail offices and mail handling offices renamed post offices
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| January 2, 1875 |
- Postal Money Order Service established
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| May 2, 1875 |
- Postal Savings Services inaugurated
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| December 22, 1885 |
- Ministry of Communications established
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| March 1, 1906 |
- Postal Giro Service inaugurated
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| October 1, 1916 |
- Postal Life Insurance Services inaugurated
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| June 1, 1949 |
- The Ministry of Posts and Telecommunications established
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| January 6, 2001 |
- In accordance with the Central Government Reform, Ministry of Public Management, Home Affairs, and Posts and Telecommunications (MPHPT) and Postal Service Agency established
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| April 1, 2003 |
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| January 23, 2006 |
- Japan Post Holdings Co., Ltd. established
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| October 1, 2007 |
- Japan Post Group(Japan Post Holdings Co., Ltd., Japan Post Service Co., Ltd., Japan Post Network Co., Ltd., Japan Post Bank Co., Ltd. and Japan Post Insurance Co., Ltd.)established
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| October 1, 2012 |
- New Japan Post Group(Japan Post Holdings Co., Ltd., Japan Post Co., Ltd., Japan Post Bank Co., Ltd. and Japan Post Insurance Co., Ltd.)inaugurated
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