On March 12, 2011.

In response to the Great East Japan Earthquake, the Mongolian government decided on March 12 to donate US$1 million to the relief donation. It was also decided to send blankets in addition to the monetary donation.

In addition, the Ministry of Foreign Affairs of Mongolia called on civil servants, employees, and individuals to donate one day’s worth of salary and asked them to donate blankets, shoes, and clothing.

On March 12, 2011.

Only four days after the earthquake, Japan received an emergency relief team from Mongolia. As the first overseas emergency relief team dispatched from Mongolia, the entire country gave its support to Japan. The emergency relief team consisted of 12 rescue team members from the Mongolian Emergency Situations Agency. The team members entered Miyagi Prefecture on the 16th, worked there from the 17th to the 19th, and returned to Mongolia on the 21st. In addition, the Mongolian Embassy in Japan arranged to send blankets (about 2,500), winter clothes, and other relief supplies to Miyagi Prefecture, which arrived on the 16th.

This document was compiled in October 2011 by the Overseas Aid Receiving and Coordination Team in charge of disaster prevention of the Cabinet Office in Japan, and contains information on human and material assistance from various countries. It lists "Mongolia (Miyagi Prefecture)" for human aid and "blankets (Mongolia)" for material aid.

After the quake, a massive tsunami with a height of over 9 meters swept across the coastal areas. The death toll, including disaster-related deaths, was 19,747, with 2,556 people missing and 120,051 houses completely destroyed (as of March 31, 2021). On the 11th, the day of the earthquake, President Tsakhiagiin Elbegdorj and Prime Minister Sükhbaataryn Batbold sent letters of condolences on the serious damage in Japan. On the 18th, Minister of Foreign Affairs and Trade, G. Zandanshatar, visited the Embassy of Japan in Mongolia on behalf of the cabinet members.

This material records the condolences and offers of support from the Ministries of Defense of various countries and regions that were sent to the Ministry of Defense in Japan. On March 12, the Chief of the General Staff of the Mongolian Armed Forces,
Ts. Byambajav, and on March 14, the Minister of Defense, L. Bold, sent messages of condolence and readiness to provide supports.

On June 13, 2012.

On March 14, 2012, a new diplomatic mission was established in Osaka, Japan. Activities in the first half of the first year were reported, including promoting Mongolian-Japanese relations in the political, economic, cultural, educational, and other fields, increasing Japanese private investment and trade, and developing regional cooperation.

On February 10, 2015.

Under the "Strategic Partnership" between Mongolia and Japan, the two countries agreed to start discussions to conclude an Economic Partnership Agreement in 2010.

The agreement was awarded as a result of negotiations with Japanese side for 7 times during 3 years since 2012 by relevant experts and officers of ministries and agencies of Mongolia.

The purpose of the agreement for Mongolia was to increase the value-added exports and foreign exchange earnings at trading, investment and industrial sectors between the two countries, as well as to reduce Japanese tariff and non-tariff barriers, facilitate trading and simplify customs clearance. This document was signed during the visit to Japan by Prime Minister Chimediin Saikhanbileg.

The agreement has 17 chapters and 10 annexes in total. It covers 17 specific issues, including the trading in goods, procedures of origin, customs procedures, plant hygiene, technical barriers for trading, trading in services, investment, improving the business environment, intellectual property, e-commerce, competition policy, dispute resolution, general and finalization, collaboration, individual migration, and government procurement.

In April 2015, L. Pürevsüren, Minister of Foreign Affairs of Mongolia, and SHIMIZU Takenori, Ambassador Extraordinary and Plenipotentiary of Japan to Mongolia, signed a Memorandum of Understanding between the governments of the two countries on the implementation of the "Water Treatment Equipment Supply Project" and "Medical Equipment Supply Project" with a total cost of 1 billion yen or its equivalent of about 16.7 billion MNT under the non-project grant.

On July 14, 2016.

In this meeting, President Ts. Elbegdorj noted that relations between Mongolia and Japan have developed rapidly based on the principles of the strategic partnership, and he and his fellow citizens were very grateful that the collaboration of both countries was deepening, while cooperation was not only bilateral but also regional and international. He additionally stated that the development of friendly relations and cooperation with Japan was one of the priorities in Mongolia's foreign policies.

It was also noted that Japan's assistance and loans have played a major role in deepening Mongolia's democracy and laying the foundation for its modern development. He said that this support was necessary for further development of Mongolia and it would be mutually beneficial for the development of the two countries’ long-term economic partnership.

On March 27, 2017, the Mid-term program of strategic partnership between Mongolia and Japan has been approved under which the political relations, cooperation between ministries and agencies, security, defense, regional and international cooperation, economic cooperation, cultural exchanges and people-to-people exchanges are to be promoted. The program was signed by Japanese Foreign Minister KISHIDA Fumio and Mongolian Foreign Minister Ts. Munkh-Orgil.