(i don't want to show his username. I think it's a bad idea...)
So, I met a Japanese conspiracy theorist on NG ,who I think is showing very dangerous thoughts. It's a actually not the first time I met him. He made a newspost explaining his ideas, with some people who warned him that his ideas were very weird and dangerous.
He drew something, with an alarming description.
I don't think he's troll, that's what is the most worrying.
You can skip the description/answers if you want. It's just some conspiracies about NESARA, "artificial super-giant earthquake", and "Osaka Expo was a Satanist ritual".
Some clarifications : GESARA/NESARA is a conspiracy theory, about an act which goal is to get rid of international debts that was shut down.
https://en.wikipedia.org/wiki/NESARA
Description of his drawing:
"Japan is dying from invasion by immigrants, heavy taxes and overwork, low wages, traitorous politicians who flirt with China, social networking speech control, poisoned vaccines, and a government siege.
But recently many Japanese have awakened and those that were about to give up are finally beginning to speak out.
Demonstrations to dismantle the heavily taxed Ministry of Finance are also taking place.
In these days of global chaos, as it is revealed one after another that good was evil and evil was good, a number of courageous individuals who tried to expose the great evil have died.
And the Osaka Expo was a Satanist ritual by the Deep State, which plans to take over the world.
This coming July, we will be hit by an artificial super-giant earthquake.
However, we cannot let this happen.
Now that the source of funding for the Deep State has changed from the US Left to the Japanese government we are fighting in a much tougher situation.
We know 100 percent that the U.S. will not help us. But thanks to the pressure of the President's tariffs,We have a chance to overthrow the Japanese Liberal Democratic Party(it's corrupt and corrupt nation)
If NESARA is successful in the US, we can follow suit and spill over into Japan to rebuild Japan.
By the time GESARA is over, everyone will be able to find their true selves without being bound by the word "minority. We must endure until that day.
There is no right or left for us now. Japan has always been tolerant of the left. But now it is the result of the left's lack of courtesy to the Japanese people and their conceit. The Japanese people live by courtesy and are courteous. It is only natural to cut off the heads of those who are disrespectful.
We, the people, must once and for all cut off the heads of the disrespectful nation.
In such a situation, Nintendo showed courageous behavior.
We Japanese must follow Nintendo's lead.
We Japanese are here as a minority, “Japanese”, not to fight with the many leftists here.
One day, when peace comes, we will be able to show people the true diversity of Japan
If you don't want to accept what I am saying, fine, but I will leave this art here to tell you that we are fighting in a small, narrow island nation."
My reponse :

(I was a bit angry, because it's the second time I see his account and that I see he didn't listened to what other people wrote.)
His response :

I'm not japanese, never set foot in Asia. I know that Japanese politics are very different from West politics, especially considering Japan's history. But what I know for sure is that fascists and imperialists are not new, and that they're still very vocal in Japan (like in any other country anyway.)
And what he write look awfully like what an imperialist/fascit would say. "We're falling, the world is against us, we need to be greater".
He say that I'm "used by the left", but he doesn't even know who I am! I'm an French-Algerian in France, our situation is way too different compared to a Japanese guy living in Japan??? Our country's history is way too different!
Something that worry me the most is what he wrote at the end of his answer :
"Soon the answers will fall from the universe, from the 5th dimension. Until that day, I will fight. For the true peace that lies beyond this chaos.
It will be all right. Don't be afraid.
Fighting for your family is not a bad thing."
Isn't that, like, what extremists say before doing something real bad? Like "nothing matters anymore, i will give my life for this cause"?
His twitter is very alarming too, he tweets conspiracy theories and re-tweet these same theorists

This same guy that he retweeted often tweet stuff like this :

Translated :

For info, "Yamato" refers to the old name of Japan.
People like Fuhisa fucking anger me. They're the type that sell stuff to vulnerable people, like if they say the truth, when they just lie.
I don't know what to do. Maybe i should just mind my own business. I guess these people are part of the Uyoku dantai anyway, and although they're usually not very liked in Japan, there's a lot of them. It's just sad.
This part is dedicated to the guy I've been talking about this whole time:
If you read this, please know that your way of thinking is very dangerous, both for your own health, and the health of others. Your ideas have nothing exceptional. As I already told you, we find people like you everywhere in the world, and they're people who are generally not well mentally. Here in France for instance, there's some people who think that a "foreign religion" will take over Europe. They're completely delusional. Don't be like them.
You need help. You seriously need help, and I, like many other, are very worried about you.
I guess that you watch a lot of news in your free time. Stop looking at the news. Just stop it. It's not good for your health. It's good to be cultured and know what is happening in your country, but the press is not perfect.