I have been getting quite a few hits on my webservers for the resource
/USH.HTML. I have never hosted this file, and do not know what it is.
Is this a type of
robots.txt file or something specific to a certain CMS?
I found out the answer, and it is a similar Japanese website that has a domain very similar to ours, but with a hyphen in the name instead. I guess all the 404s are due to a typo on the referring link.