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If China Invades Taiwan, What Would Japan Do?
The Diplomat ^ | January 05, 2026

Posted on 01/05/2026 1:11:08 PM PST by nickcarraway

Given all that’s at stake, how would Japan respond in a scenario that could lead to the world’s first great power war since 1945?

Imagine this scenario: it’s finally happening. China is moving to take Taiwan by force. Chinese warships are blockading the island of Taiwan and the surrounding area, while missiles and UAVs rain down destruction on the Taiwanese people from above.

In this hypothetical scenario, what is Japan doing?

This is a question of some urgency for Tokyo these days. For one thing, Japan’s westernmost island is only about 110 kilometers away from Taiwan – much closer than it is to the Japanese mainland. Then, of course, there’s the question of a more direct attack on the homeland: Japan hosts around 55,000 U.S. soldiers on 15 major bases. China could easily decide to target these sites.

Given all that’s at stake, how would Japan respond in a scenario that could lead to the world’s first great power war since 1945? And In a clash between two superpowers, would Japan’s contribution matter?

In this episode of Diplomat Asia, we explain Japan’s military and security strategy for a Taiwan contingency – and why the United States’ choices will be key to any action by Japan.


TOPICS: China; Editorial; Japan; News/Current Events; Taiwan; War
KEYWORDS: asia; banzai; bloggers; china; japan; japanwilldonothing; japanwillsinkthem; redchina; redchinaworldpolice; sidebarabuse; tainwan; taiwan; theywont
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If China Invades Taiwan, What Would Japan Do? (Video)
1 posted on 01/05/2026 1:11:08 PM PST by nickcarraway
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To: nickcarraway

Dunno, maybe China can FAFO and show us?


2 posted on 01/05/2026 1:15:23 PM PST by null and void (To them, words are merely a means to deceive humans.)
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To: nickcarraway
Japan annexed Taiwan back in 1895.

It was handed over to the Republic of China in 1945 where it has remained.

If the Chi-Coms try to make it otherwise they will find it was a very big mistake.

Japan has taken to being civilization very nicely. But pushing them too hard would be a grave error.

3 posted on 01/05/2026 1:17:32 PM PST by Harmless Teddy Bear (It's like somebody just put the Constitution up on a wall …. and shot the First Amendment -Mike Rowe)
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To: nickcarraway

it would take the US days to sink the PLAN, Japan would take a bit longer.


4 posted on 01/05/2026 1:17:53 PM PST by PIF (They came for me and mine ... now its your turn)
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To: nickcarraway

5 posted on 01/05/2026 1:20:53 PM PST by Sirius Lee ("Never argue with a fool, onlookers may not be able to tell the difference.)
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To: PIF
it would take the US days to sink the PLAN, Japan would take a bit longer.

How long to wipe out China's Dams?

6 posted on 01/05/2026 1:21:43 PM PST by null and void (To them, words are merely a means to deceive humans.)
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To: nickcarraway

Take over our duties in Korea while we go toe-to-toe with the ChiComs?

I don’t see them doing much beyond their territorial limits.


7 posted on 01/05/2026 1:25:50 PM PST by BradyLS (DO NOT FEED THE BEARS!)
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To: All

Akira blows up China


8 posted on 01/05/2026 1:27:31 PM PST by escapefromboston (Peace, commerce and honest friendship with all nations, entangling alliances with none.)
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To: nickcarraway

If they believe the US is in the fight, they would fight like WWII.

As for the question “would their contribution matter?”

Absolutely. They would be the deciding factor.

They still have a warrior culture, expertise and American weapons. They would punch well above their weight.


9 posted on 01/05/2026 1:28:45 PM PST by Mariner (War Criminal #18)
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To: BradyLS; delta7

China is too busy taking over eastern Russia.


10 posted on 01/05/2026 1:29:24 PM PST by TexasGator (1)
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To: nickcarraway

China still claims the Ryukyu Islands chain (including Okinawa) belongs to them, and that the San Francisco Treaty improperly returned them to Japan. Just recently, they began making some noise about it, after Japan elected a conservative /hawkish Prime Minister. If China takes Taiwan, the Ryukyus will eventually follow, starting with the Yaeyama Islands.


11 posted on 01/05/2026 1:29:48 PM PST by ETCM (“There is no security, no safety, in the appeasement of evil.” — Ronald Reagan)
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To: nickcarraway

Japan is moving itself to being a military power and being prepared for war with China, I don’t know what they would do, but they are preparing themselves to have the war option available.


12 posted on 01/05/2026 1:30:41 PM PST by ansel12 ((NATO warrior under Reagan, and RA under Nixon, bemoaning the pro-Russians from Vietnam to Ukraine.))
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To: BradyLS
China, like Russia, has never been very good at projecting military power outside their borders.

Sure Taiwan was theirs over 130 years ago but that is not much of a claim.

13 posted on 01/05/2026 1:32:53 PM PST by Harmless Teddy Bear (It's like somebody just put the Constitution up on a wall …. and shot the First Amendment -Mike Rowe)
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To: nickcarraway

My gut feel is that Japan would fight with us.


14 posted on 01/05/2026 1:38:18 PM PST by libertylover (The HBM (Has Been Media) is almost all AGENDA-DRIVEN and HATE-DRIVEN, not-truth driven.)
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To: nickcarraway

There’s a reason Japan recently participated in the Naval exercises of the US in the Western Pacific, followed by a number of US port visits. It wasn’t just to hang out together.


15 posted on 01/05/2026 1:40:00 PM PST by Bob Wills is still the king
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To: nickcarraway

For more than 60 years, Japan and the US have had a mutual defense treaty. The history and its provisions have been brought to us by Grok today:

“The U.S.-Japan military alliance, established by the
1960 Treaty of Mutual Cooperation and Security, is a cornerstone of Indo-Pacific security, providing U.S. troop presence in Japan for mutual defense against threats from China, North Korea, and Russia, while Japan contributes resources and boosts its own defense capabilities, including co-developing defense tech and expanding roles in regional security, solidifying a strong, evolving partnership focused on deterrence, stability, and shared strategic goals.
Key Aspects

Mutual Defense: The core treaty guarantees U.S. security for Japan, obligating the U.S. to defend Japan if attacked, and vice versa.
U.S. Troop Presence: Around 55,000 U.S. personnel are stationed in Japan, supported by extensive U.S. military assets.
Japanese Contributions: Japan provides land and facilities for U.S. forces, and its Japan Self-Defense Forces (JSDF) increasingly take on broader roles, including overseas security assistance and defense equipment co-development.
Addressing Regional Threats: The alliance directly counters challenges posed by China’s growing power, North Korea’s nuclear programs, and Russia’s aggression.
Evolution & Integration: The alliance has deepened significantly, moving beyond basic security to joint exercises, missile defense, and broader strategic cooperation, with recent revamps focusing on greater integration and shared production of defense equipment.
Trilateral Cooperation: The alliance also strengthens trilateral efforts with South Korea and partners with Australia, the Philippines, and others (like the Quad).

Recent Developments

Enhanced Defense Cooperation: Discussions include joint development of next-generation fighter jets (with the UK/Italy) and restructuring U.S. command in Japan.
Focus on China: A key objective is coordinating strategies to counter China’s influence in the Indo-Pacific.
Strengthening Capabilities: Japan is enhancing its defense spending and capabilities, with the alliance adapting to new security challenges.

In essence, the alliance has transformed from a post-war arrangement into a dynamic, integrated partnership, crucial for maintaining stability in a changing geopolitical landscape.”


16 posted on 01/05/2026 1:43:55 PM PST by Bob Wills is still the king
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To: sauropod

Bflv


17 posted on 01/05/2026 1:47:41 PM PST by sauropod
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To: nickcarraway
I wouldn't care that much what happened to Taiwan...

if we still fabricated our own chips in America. But like so many other industries, it was sent overseas by our bi-partisan corruptocrats. But chips - like rare earth minerals - are far more important than steel or textiles, and we must re-build our capacity ASAP.

18 posted on 01/05/2026 1:48:41 PM PST by montag813
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To: nickcarraway

The calculus of the CCP planning and carrying out an invasion of Taiwan has been greatly reordered by the events in Venezuela.

For one thing, the CCP footprint in Caracas has been much smaller in the succeeding hours after the raid. Now almost certainly denied any supply of oil from Venezuela, the desperation of the Chinese for energy supplies from anywhere else is sharply increased. The example of the US having a concentrated military and naval presence surrounding Venezuela, and the willingness to use that might, brings the Chinese presence in the Taiwan Strait into question - do they have the same determination that Trump has shown?

One of Trump’s greatest strengths is his sheer unpredictability. He continually keeps the rest of the world off balance, and fills many of their leaders with an underlying dread they may be the next targets.

When Trump says “Jump!” there is a chorus all over the world responding with “How high?”

Boogety-boogety-boo.


19 posted on 01/05/2026 1:51:59 PM PST by alloysteel (Coming in high, hot, blind, dead-stick, wheels up, outta gas, and the glide angle of a brick....)
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To: nickcarraway
China could easily decide to target these sites.

But why?

Who do you think USA is gonna support more?

20 posted on 01/05/2026 1:53:04 PM PST by Elsie ( Heck is where people, who don't believe in Gosh, think they are not going...)
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