As part of its wider military build up along the Japanese archipelagos in the East China Sea, Japan activates a new radar station on the island of Yonaguni that is close to the disputed Senkaku Islands.
The United States and Japan approve a plan for a joint military operation in response to a possible "Taiwan emergency". The operation would consist of deploying U.S. Marines on the Ryukyu Islands near Taiwan, while the Japan Self-Defense Forces would provide logistical support such as ammunition and fuel supplies.
Japan announces it will raise military spending (1.1%) for an eighth consecutive year to a record high as it invests in ballistic missile and air defence to counter a perceived threat from North Korea and China.
Japan places its military on high alert to be ready to shoot down any missile heading for its territory amid reports of a possible North Korean launch of an intermediate-range missile from its east coast.
Japan summons China's ambassador, Cheng Yonghua, to Tokyo after a People's Liberation Army Navy warship sailed close to its territorial waters near the disputed Senkaku Islands in the East China Sea for the first time.
As part of its wider military build up along the Japanese archipelagos in the East China Sea, Japan activates a new radar station on the island of Yonaguni that is close to the disputed Senkaku Islands. [https:--www.reuters.com-article-us-japan-china-eastchinasea-idUSKCN0WT0QZ (Reuters)]China–Japan relations
Japan's lower house of parliament passes a pair of bills changing the country's security laws, allowing Japanese soldiers to fight overseas for the first time since the end of World War II under certain conditions, over strong protests from opposition lawmakers, who walked out of the vote.