Vol.24. June 30. 2025
What is happening in East Asian Maritime Security? The Research Institute for Peace and Security (RIPS) publishes the biweekly newsletter, the information on maritime security relevant to East Asia and Japan's territory. |
Statistical Data and Analysis (as of June 30)
The G7 Kananaskis Summit was held from June 16 to 17. The G7 emphasized at the importance of a free and open Indo-Pacific, and also discussed China's maritime expansion in the East and South China Sea.
From last month to the latter half of this month, Chinese Navy aircraft carriers (Lioning and Shandong) conducted exercise in the western Pacific.
On June 20, Japan Coast Guard hosted a joint exercise with the U.S. and the Philippine Coast Guard in Kagoshima Prefecture. This is the first time for Japan Coast Guard to host the Japan, the US and the Philippine trilateral exercise.
Cooperation between the coast guards of Japan, the United States, and the Philippines has been rapidly strengthening since last year.
[Statistical Data as of June 30]
Japan Coast Guard (JCG) daily updates the statistical data on the number of China Coast Guard vessels entering in the contiguous zone around the Senkaku Islands and intruding into Japanese territorial waters. The below is from the website of JCG.
https://www.kaiho.mlit.go.jp/
mission/senkaku/senkaku.html
May. |
Contiguous zone |
Territorial
Waters |
Jun. |
Contiguous zone |
Territorial
Waters |
16 |
4 |
|
26 |
4 |
|
17 |
4 |
|
27 |
2 |
|
18 |
4 |
|
28 |
4 |
|
19 |
4 |
|
29 |
4 |
|
20 |
4 |
|
30 |
|
|
21 |
4 |
|
|
|
|
22 |
4 |
|
|
|
|
23 |
4 |
|
|
|
|
24 |
4 |
|
|
|
|
25 |
2 |
|
|
|
|
|
|
|
|
Date |
Topics |
6/16 |
The China Coast Guard is
strengthening its cooperation
with the Chinese Navy around
Taiwan.
The China Coast Guard is
under the command of the
Central Military Commission, China's highest military
leadership body, and deploys
gray zone operations by non-military means as a vanguard for "changing
the status quo”.
It also plays a key role in
the blockade or “ isolation”
of key ports in the military exercises that China has regularly
conducted around Taiwan since last year.
“The China Coast Guard is an
incarnation of the Navy. It
is like having two signs in the same army." In March,
Deputy Chief of Taiwan's
Coast Guard, Hsieh Ching-
ching, revealed the difficulties
faced by the Taiwan Coast
Guard relative to the China
Coast Guard.
The China Coast Guard has a
close relationship with the
Chinese Navy and is also
known as the "Second Navy”.
In last October's military
exercise “Joint Sword -2024B,”
China operated 17 naval vessels and 17 Coast Guard ships in
unison for the first time to conduct a drill
surrounding Taiwan. During the “Strait
Thunderbolt-2025A” military exercise in April of
this year, Chinese Coast Guard ships also conducted “law
enforcement” drills, including on-site inspections and seizures.
Researcher Shen Ming-Tsu of
the National Defense Security
Research Institute, a think-
tank affiliated with Taiwan's
Ministry of National Defense,
explains that "China's military actions
againstTaiwan are divided
into three stages: isolation, blockade, and
invasion.
While the Chinese navy will
play a major role in the all-
out “blockade” phase, the Chinese Coast Guard, a
law enforcement agency, will take the lead in the “isolation” phase, which will restrict civilian
vessels carrying strategic
cargoes.
For the Chinese side, the
Coast Guard-led isolation has
the advantage of increasing
pressure on Taiwan without forcing the
U.S. and other countries to
intervene militarily.
According to the U.S.
Department of Defense, the
Chinese Coast Guard is “the world's largest maritime
law enforcement agency,” with more than 150 vessels of over 1,000 tons
displacement.
Also, as it is called a “de
facto navy,” many of its
quasi-military vessels are converted from decommissioned
destroyers and frigates of
the Chinese Navy.
The Chinese Coast Guard is
also strengthening its
cooperation with the maritime
militia, which is considered the "
third navy”. Militia
activities have been
prominent in the South China Sea, and
Taiwan's Ministry of National
Defense announced in April
that three militia vessels
participated in “Strait
Thunderbolt-2025A” off the
eastern coast of Taiwan.
It has been noted that in
previous military exercises, "
ships of the maritime militia have conducted gray zone
operations in cooperation
with ships of the Chinese
Coast Guard”.
|
|
6/16 |
The Japan Coast Guard has
announced that a welcome
ceremony for the joint
exercise, involving Japan, the United
States and the Philippines,
will be held on 16 June.
The exercise will take place
in Kinko-wan Bay, Kagoshima
Prefecture, Japan.
This will be the first time
that a joint drill has been
held in Japan.
Recently, the Chinese Coast
Guard has become more
assertive, and the
Philippines are facing strong pressure
from China in the South China
Sea.
While the Philippines are
trying to withstand Chinese
pressure, they lack the
capability to deal with the Chinese
Coast Guard. Japan and the
United States have provided the Philippines with large
vessels, but there are
insufficient numbers to deal
with China.
Japan and the United States
are urgent to assist the
capacity building of the Philippines’ Coast Guard.
|
|
6/16 |
Ministry of Foreign Affairs
of Japan announced that the
State Minister for Foreign
Affairs, Takuma MIYAJI attended the
welcome ceremony for the
joint coast guard drills in
Kagoshima.
Minister MIYAJI stated that
strengthening the cooperation
with the allies and like-
minded countries are more important to fulfill
the Free and Open Indo-
Pacific, and that he was very pleased
to hold this joint training
exercise in Japan for the first time, as
cooperation among the three
countries has been
progressing, especially in the field of
maritime security.
|
Ministry of Foreign Affiars of Japan
|
|
6/16 |
JMSDF confirmed one Russian
Udaloy I class destroyer (
hull number 564) and one Udaloy II class destroyer
(hull number 543) sailing
northeast in the waters 120km southwest
of Cape Soya (Hokkaido) on
June 14.
JMSDF then confirmed these
vessels were sailing east in
Cape Soya.
|
|
6/16 |
JMSDF confirmed two Russian
Steregushchiy class frigate (
hull number 339 and 343) and one Dubna class replenishment
oiler sailing northeast in the waters 100km southwest of Tsushima Island (Nagasaki Prefecture) on June
15.
JMSDF then confirmed these
vessels were sailing
northeast through the
Tsushima Strait
toward the Sea of Japan.
|
|
6/17 |
JMSDF confirmed several
Chinese naval vessels,
including two Admiral
Kuznetsov class aircraft carriers (
Lioning, hull number 16 and
Shandong, hull number17), in the Pacific Ocean.
JMSDF also confirmed that
Chinese aircraft carriers had
conducted fighters’ take-off and
landing.
|
|
6/17 |
Canada announced the summary
of the Group of Seven (G7) in
Kananaskis, Canada on June 17.
The leaders of G7 highlighted
“the importance of a free,
open, prosperous and secure Indo-Pafic, based on the rule
of Law,” and they discussed “their ongoing serious
concerns about China’s
destabilizing activities in the East and South China Seas and the
importance of maintaining the peace and stability across the Taiwan Strait”.
Prime Minister of Canada
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|
6/19 |
UK Royal Navy announced that
their patrol vessel has
sailed through the Taiwan
Strait on June 19. HMS Spey has
navigated through the Taiwan
Strait for the first time
since 2021, when the HMS Richmond was
deployed in the East China Sea.
China criticized UK patrol
as an international
provocation and a disruptive
act that undermines peace and security.
|
|
6/19 |
JS Takanami sailed through
the Taiwan Strait on June 12.
This is the third time for a
JMSDF vessel to navigate in
the Taiwan Strait.
According to government
sources, Takanami
deliberately passed through the Taiwan Strait on its way
to the South China Sea to
participate in a joint exercise with the
Philippine Navy.
|
|
6/20 |
Japan Coast Guard hosted a
joint exercise with the U.S.
and the Philippine Coast Guard on June 20.
This exercise is aimed to
strengthen the cooperation
between three coast guards
facing the expansion of China’s
assertiveness in the East and
South China Sea.
This is the second time to
hold the trilateral exercise
and the first time for Japan
to host the US-Japan-the
Philippine trilateral
exercise.
|
The Sankei Shimbun (Japanese)
|
|
6/20 |
JMSDF continuously observed
several Chinese naval vessels,
including two Admiral
Kuznetsov class aircraft carriers (Lioning, hull number 16 and
Shandong, hull number17), in the Pacific Ocean. JMSDF
also confirmed that Chinese
aircraft carriers had conducted fighters’ take-
off and landing.
On June 20, JMSDF also
confirmed that Lioning, two
Luyang III class destroyers (hull number 121 and 122),
two Renhai class destroyers (
hull number 101 and 104), and one Fuyu class fast
combat support ship sailing
northwest in the waters of
Okinawa and navigated to the East
China Sea.
|
|
6/21 |
The Philippines announced
that one of the Chinese Coast
Guard vessels fired a water cannon at the Philippine Coast Guard
vessels on June 20.
According to the announcement,
four Philippine vessels were
blocked by a Chinese Coast Guard ship, while supplying fuel to
Philippine fishing boats. The Philippine side released
the video showing one Chinese
vessel targeting the Philippine
vessels with water cannon.
The Philippine accuse Chinese
Coast Guard of acting
illegally and endangering the lives of the
crew members.
|
|
6/21 |
The 4th Escort Flotilla (
JMSDF) vessels, the JS Ise and the
JS Suzunami, made a port call in Manila, and held a welcome ceremony. At the press conference, when
asked about China’s water
cannon issues, Rear Admiral Takashi NATSUI,
commander of Escort Flotilla
4, said that China’s attempt to changethe status quo by
force is a serious challenge
to the fee and open
international order based on
the rule of law.
NHK News (Japanese)
|
|
6/23 |
JMSDF continuously observed
several Chinese naval vessels,
including two Admiral
Kuznetsov class aircraft
carriers (Shandong, hull
number17),in the Pacific Ocean. JMSDF
also confirmed that Chinese
aircraft carriers had conducted fighters’ take-
off and landing.
On June 23, JMSDF confirmed
Shandong and its escort
vessels navigated to the South China Sea. JMSDF confirmed about times take-off and landing from Shandon between June 20 to 22.
Blue: Shandong Pink: Lioning
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6/23 |
JMSDF confirmed two Chinese
Jiangkai II class frigates (
hull number 538 and 550) and Renhai class destroyer (
hull number 102), and Fuchi class fast combat oiler
(hull number 903) sailing
northwest in the waters 110km northeast
of Miyako Island (Okinawa
Prefecture) on June 22.
JMSDF subsequently confirmed
these vessels were sailing
northwest through the waters between
Miyako and Okinawa Islands
toward the East China Sea.
This squad is the same one
observed in the Osumi Strait
on June 4-5.
|
|
6/24 |
Ministry of Foreign Affairs
of Japan issued the press
release on Chinese one-sided natural resources development
in the East China Sea on June
24.
The press release announced
that the government of Japan
confirmed Chinese activities to install a structure in the
west side of geographic Japan-China median
line in the East China Sea.
Japan expresses its profound
regret to China,
and Masaaki KANAI, the
director of Asian and
Oceanian Bureau,
strongly protested to Shi
Yong, Minister Counselor of
the Chinese Embassy.
|
Ministry of Foreign Affairs of Japan
|
|
6/25 |
China responded to the
Japanese protest on the
structure in the East China
Sea.
At the press conference, Guo
Jiakun, deputy director of
the Information, said that we cannot accept
the unsubstantiated protest
and insist that Chinese
activities are completely
Chinese sovereignty.
|
|
6/26 |
JMSDF confirmed one Russian
Udaloy I class destroyer (
hull number 564) and one Udaloy II class destroyer
(hull number 543) sailing west in the waters 30km north of Cape Soya (Hokkaido) on
June 25.
JMSDF then confirmed these
vessels were sailing west in the Soya Strait.
JMSDF also confirmed four Russian vessels from June 25 to 26.
On June 25, JMSDF confirmed Russian Tarantul III class corvette (hull number 971) sailing west in the warters 40km north of Cape Soya.
On June 26, JMSDF confirmed two Russian Steregushchiy class frigates (hull number 333 and 335) and one Udaloy I class destroyer (hull number 564) sailing west in the waters 30km north of Cape Soya.
From 25 to 26 June, these
vessels navigated west
through the Soya Strait.
These are the same vessels
that were confirmed sailing
east in the Soya Strait on 12 and 14 June.
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6/26 |
On June 26, Japan Joint Staff
confirmed one Chinese UAV (
estimated) flying from the East China Sea to the Pacific
Ocean through the area between Yonagunijim
Island and Taiwan.
This UAV then turned and flew back to the
East China Sea through the same area.
(Red Line)
On the same day, Japan Joint Staff also confirmed another Chinese UAV (estimated) flying from the Pacific Ocean to the East China Sea through the area between Yonaguni Island and Taiwan. (Yellow Line)
Japan Air Self-Defense
Force scrambled to this UAV.
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