A Chinese Navy research ship entered Japanese territorial waters Sunday morning near Yakushima, an island in southern Kagoshima Prefecture.. It is reported by Kyodo with reference to the Ministry of Defense of Japan..

According to the ministry, the ship entered Japanese waters at around 2:30 a.m. local time and left at about 4:10 a.m., heading west.. The Japanese government expressed serious concern to China over the invasion.

Chinese ships often enter Japanese territorial waters, which is the reason for constant tension between the two countries.. According to Kyodo, the latest invasion took place in December..

[see_also ids\u003d"

The Philippines recently claimed that two Chinese coast guard ships and two Chinese maritime militia ships were tracking their warship off Mischief Reef in the South China Sea..

NATO Secretary General Jens Stoltenberg and Japanese Prime Minister Fumio Kishida pledged to strengthen ties between the parties when they met in January, saying Russia's invasion of Ukraine and the Kremlin's growing military cooperation with China had created the most tense security environment since World War II..

Worried about the rapid development of armaments in China and North Korea, Japan adopted key security and defense reforms in December, including the creation of a counter-strike capability, moving away from the purely self-defense principle it followed after World War II.. What are the three main threats to the country that Tokyo sees and what is discussed in the updated main documents of the country in the field of security and defense, read the article by Ukraine's Ambassador to Japan Serhiy Korsunsky \! "