Japanese website hack and 3rd party link indexing

A few months ago our website got hacked, similar to what seems to be described in the following – https://developers.google.com/webmasters/hacked/docs/fixing_the_japanese_keyword_hack

We fixed the original part of it, by clearing the website itself so we no longer display Japanese hoodie sale pages.

Currently the issue we are having is that multiple 3rd party domains are still continuously generating links to our domain on their site and Google is indexing them e.g.

  • ourdomain.com/bumper23075
  • ourdomain.com/miraculously_G7nOG7nrnO.
  • ourdomain.com/iterate_JeIEbNG0.

(I got these links by going to site:ourdomain.com)

All of these generated links are throwing 404 errors, because the path now does not exist. This is causing us to have an extremely high bounce rate as most of our traffic now comes from Japan and surrounding countries to these dead links, and are immediately leaving because the page doesn’t exist.
This is, in turn, causing us to drop in search rankings massively.

Do you have any suggestions on how I can properly tackle this issue and have it sorted once and for all. Stopping these 3rd party link generations and having our domain show as clean and only displaying URL’s submitted in our sitemap?

A few notes.
– The steps have been followed to remove the ‘This site may be hacked’ message
– Our site currently seems stable and not hacked, so the main issue is the 3rd party generated links

Any help on this subject would be greatly appreciated as it is becoming a serious issue in terms of us utilising our website properly.

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