After the Chinese ships tried to approach four Japanese fishing boats that were sailing in waters south of Uotsurijima, one of the Senkaku Islands, the Japan Coast Guard ensured the safety of the boats and warned the Chinese ships to leave Japanese waters, The Japan Times reported.

It was the 22nd intrusion into Japanese waters around the island chain by Chinese government ships this year.

Interestingly, the Okinawa Prefecture islands are claimed by China. Beijing calls the region Diaoyu.