How popular are nationalistic right-wing social media influencers in Japan among Japanese people?

Think about Ken Kenobi or Yusuke Kawai whom have been appearing quite a lot on my social media lately.

They're both very much against (mass) immigration. I know that Kawai is mostly involved in politics himself as maybe a candidate, but I especially notice Ken Kenobi, who's just a social media person, being quite popular among white western people and even claiming himself to be a proud Japanese version of Nick Fuentes and all these other far right-wing American speakers. Mostly against Muslim migration from South Asia and Kurdish people lately, and is quite vocal how he puts white people much higher in value and worth than POC (said the N a few times too to make that clear.)

Have people like them been increasing over the years like it's been happening elsewhere or is it just a loud minority? And should anyone who goes there on holidays or a visa who's POC be worried in the future?