How to contact universal studios japan

I went to USJ today and it was awesome and I loved it so much, except that I lost something extremely important to me there.
It�fs just a stuffed penguin keychain, but it means a lot to me and I was extremely heartbroken upon finding out that I had lost it. I was already out of the park then, so I could not do anything about it.
I wanted to contact USJ to figure it if there was the slightest chance of retrieving it if park Operators happened to pick it up, but their website had no details.
Any help would be very much appreciated. Please, it really, really, really means a lot to me, even though it may sound stupid, but I would really like it back.

Hi,
I'm sorry that you lost your keychain!
According to this page http://www.usj.co.jp/faq/parkguide/00026.html you may call this number to ask if it was found: 0570-20-0606
(it might not work from certain phones, in which case you should dial 06-6465-4005)
I am not sure if it offers English support.

Are you still in Japan? If so they might be able to send it to you as "chaku-barai" (meaning you will pay for the shipping when the courier delivers it). But if you're abroad they might be unable to send it. I's still worth trying though.
Good luck!