1. Japan's sending troops faces the restriction of the peaceful constitution
According to the current Japanese Constitution, all Japanese military forces can only be used for self-defence. Direct military assistance to Taiwan is equivalent to a declaration of war against China. Not only China does not allow it, but other countries such as the United States cannot allow it to happen. However, it is possible for Japan to provide logistical support and so-called humanitarian assistance to the enemy in order to disgust China.
2. Japanese people are also unwilling to fight for Taiwan
What is the reason for fighting for Taiwan? Is it for freedom and democracy? On the one hand, Japan cannot gain corresponding benefits by fighting for Taiwan. On the other hand, the cruelty of war is vividly visible. Young people living in peace are not willing to fight, let alone fight for Taiwan.
Some netizens said that the reunification of Taiwan by the mainland and the control of the Taiwan Strait would affect Japan's trade channels. Taiwan is vital to Japan's life, so Japan will make a chance at all costs. If Japan is engaged in trade, you can sail freely. If you have a military plan and are malicious, even if the two sides are not united, you will still be killed to come to the Taiwan Strait.
China has the ability to smash Japan.
Japan cannot bear the consequences of military intervention in China's Taiwan Strait issue. If Japan intervenes in the Taiwan Strait, no matter the mainland or any inch of Taiwan's Chinese territory, we have reason to attack Japan. If Japan joins the war, it will definitely be given a one-time service for a century-old peace. Professor Jin Canrong of the National People's Congress predicted that within two hours, the PLA could completely destroy the US military, the Japanese Self-Defense Force and the South Korean military deployment in Asia.
Moreover, Japan's American father will not interfere with China's reunification of Taiwan by force.
So why do Taiwanese people think that Japan will use force against the mainland for Taiwan's sake?