Hello,
Thank you for contacting Rank Math and bringing your concern to our attention. I’m sorry for any inconvenience this issue may have caused you.
We’ve checked your site using the site:
operator, and there are a lot of Japanese URLs appearing on the results.
That is a clear indication that a website is infected with malware. This is usually related to the Japanese keyword hack: https://web.dev/articles/fixing-the-japanese-keyword-hack
If this is happening very recently and you take action now, you could still stop the results from going to SERPs.
We would recommend starting by performing a security audit of the website and fixing any issues you find.
Looking forward to helping you.