The site name “Japanese Language and Usage” sounds like a logical error to me, and it should be changed to either “Japanese Language and Its Usage” or simply “Japanese Language.”
I can parse the current title only as either (1) “Japanese [Language and Usage]” or (2) “[Japanese Language] and [Usage].” The parsing (1) means that it is a site for questions about the Japanese language and the usage of anything Japanese (Japanese people etc.). The parsing (2) means that it is a site for questions about the Japanese language and the usage of everything (such as an automatic tin opener), which is even more ridiculous.