During this period, there have been various developments regarding maritime security in East Asia.

  Entering by Chinese Coast Guard vessels into the Japanese contiguous zone around the Senkaku Islands have been confirmed on an ongoing basis. During this period, the intrusions into Japan's territorial waters around the Senkaku Islands also occurred intermittently.

  On May 3, Japan's Constitution Day, Chinese Coast Guard vessels intruded into Japanese territorial waters around the Senkaku Islands, and a helicopter took off from the intruding Chinese Coast Guard vessels and violated Japanese airspace. This is the first time that a helicopter from a Chinese Coast Guard vessel has violated Japanese airspace around the Senkaku Islands. In the future, we need to be extremely vigilant against this type of airspace violation.

  In recent years, a number of survey activities by foreign oceanographic research vessels without Japan's prior consent or different from the contents of the prior consent have been confirmed in the waters surrounding Japan. The Japan Coast Guard (JCG) has published a document summarizing the activities of such foreign oceanographic research vessels.

  For more information;
https://www.kaiho.mlit.go.jp/info/topics/files/250512_tokuikodo.pdf