I've followed PewDiePie for some time, until he moved into Japan. And him being rich didn't help. Legally, he is still considered a mid-income man. He owned property in Japan for 3 years and still wasn't able to go there. Because when he thought things were going in his way the pandemic happened.
He learned quite a bit of Japanese, sadly he struggled with it a lot. Complained with laughter how hard the language is.
His wife wasn't able to help him, because she is Italian and isn't very knowledgeable in Japanese.
What also didn't help is that he didn't have (I think) any friends, who were living in Japan. Only in South Korea.