Incidentally the smallest form has a sticker inside which says "World Electric Company Co. Ltd"- could that be the receipt?
Yes and this would have a date (or area of one) that represents the date of purchase, this date is the START date of your warranty.
You need to zoom in on the top left paper as that (i think) is the warranty card. Then hopefully someone here can translate it for you.. The warranty card will have a serial number on it....the reciept will have a sticker....I think the warranty is more like cardboard-ish than paper...What I have doens't seem to be shown here...but that may be diferent on different batches of C860's
I had a translated version of both, but my HDD crashed and I can't find it....but I very certain about the reciept/date, etc
As for the warranty card, as I recall it is Name Address, phone and description of problem....even if they are in the wrong field, those are what you are going to need to tell them anyway. And they should be able to contact you (email/phone) should they need more. But first you need to find the paper that has the seriual number...might be wedged in the book still.
Also, The part I don't know is what the addess is to send the unit.
I suggest a new thread entitled "Warranty: Human Japanese Translation needed" and I am sure someone will break it down for you.
On the positive side, you have a reciept...so that should set your mind partailly at ease.