How does he know the person is Japanese? The title is Arabic and the picture is of a non-Asian female. I find a lot of deception nowadays with a majority of angry MAGA turning out to not even be American!! I've found that the people who are most full of shit and pro-USA/anti-China on Facebook are Indian/Filipino. The cheerleaders are most aggressive because they can write checks as if American, that their nations will never have to cash.
Forgive my foolishness but I always hold out hope when it comes to another East Asian country, perhaps because I think that a fellow East Asian can't be so stupid, perhaps because the in-person politeness conceals an evil beyond my ability to detect... and perhaps because I just like East Asian faces...
But from the interviews I see of the Japanese, I see very few instances of begrudging hatred but mostly instances of poor education and confirmation bias in otherwise reasonable people. The primary reason for which I've seen interviewed Japanese people dislike Chinese people can be separated into 2 categories: 1. Has an incorrect understanding of events/history 2. Heard that Chinese people were ill-behaved and immediately believes this once they see anything reinforcing it.
1. Has an incorrect understanding of events/history
Over this incident, a lot of Japanese are fooled by their government into thinking that Takaichi said something very benign. I've heard some say that she simply claimed that if China's attack on Taiwan were expanded into an invasion on Japan, Japan's military must respond. Others think she said something like the military would be summoned to quickly and efficiently save and evacuate Japanese citizens from a Taiwanese warzone. Yet others asked why China was so aggressive threatening to invade and devour a neighboring country showing that they did not know that Taiwan island is recognized by Japan as a part of China. They wondered why China threatened to cut Japan's head off over this basic desire to protect itself. They think China went way too far despite expressing a desire for peace and positive relations with China. But nobody interviewed understood correctly that Japan recognizes Taiwan as a part of China due to its acceptance of the Once China Policy, and therefore, Takaichi's remark of intervening with Japan's military meant that she would send Japan's self-defense forces to invade China during a Chinese civil war.
On Facebook, I have a conversation with one Japanese man whom I treated quite aggressively because I assumed that he knew what Takaichi said and wanted to defend it. He responded again and again when I called Japan a dog and all sorts of insults but eventually tried to reason with me about how peaceful and defensive Japan was and how China's comment was over the top. So then I realized he didn't know what was happening and I accepted to reason with him. When I told him the bolded part above, he was finished. He no longer responded like a ghost disappearing after he got his justice. That is why I feel that Japanese people may be reasonable if told the truth.
2. Heard that Chinese people were ill-behaved and immediately believes this once they see anything reinforcing it
What can I say? Don't make trouble where you go. Japan is an extremely polite society with many many interpersonal rules, and they don't like foreigners, any foreigners, and that's fine. So I recommend simply doing business with Japan when they are good and leaving them alone when they are bad. Don't go there. Just don't because Japan is an especially sensitive society and honestly some Chinese people treat a place like their rented party pad just because they paid for their vacation package. I've heard of harassing deer, open defecation (was it a child?), line-skipping, buffet-fucking, buying an absurd number of things and lugging it everywhere, making high volume calls in public, etc... I don't know how much of it is amplified by media and how much of it is real but if they don't want us there, then we shouldn't be there. Keep it all business with Japan.
And then there's old males; a category on their own and fairly binary. There's those who think that China will invade Japan if given the oppertunity and therefore must be destroyed before it destroys Japan, and there's those who are extremely well-versed in history and very very based and apologetic with a positive attitude.