This could get tricky real fast, when I got my car imported it had tv and GPS built in, the kit was useless as there was no way to get it in english.
Unless theres a option to change language, or a CD/DVD you can change to English Im not sure what else you can do other than learn Japanese, I hope you have better luck than I did!
If youre just after manuals there must be a Accord owners club online with them somewhere