A 30-year-old woman from Zentsuji City, Kagawa Prefecture, is facing legal consequences after accusing Ranking Of Kings manga creator Sosuke Toka of being a
Japan has really strict defamation laws. You can somehow get in trouble just for staying verified facts if they make someone look bad. Japan is fucked.
If you can verify a fact its not illegal unless in very specific circumstances.
Calling someone a pedophile without any proof and just because you hate them is very obviously not ok and will get you in legal trouble in almost every country in the world.
And there's a difference between libel and stating facts about someone that they don't like. I can't say for certain which those tweets are, especially since I can't actually read them right now.
You may as well sue everyone then, especially on the internet and even more so on Twitter. To sue randos on the internet as a famous person because someone said something bad about you is just wild and petty, unless it did considerable harm to your reputation.