There are so many of Japanese brand skincare whitening products.
I've seen in latest Japanese Magazines, there are many new skin care line products, including whitening.
But, they rarely give a free sample of their products from the catalogue order here in Japan.
DHC is pretty famous here. I can easily get the products here from a convenient store, super market or drugstores. Kose, my sister in-law uses their whitening products, which is confuse me that she already has clear-bright skin (Asia white skin), then why she have to use all that whitening products lol.
The new whitening-essence product from IPSA is also seems good, but it's a bit pricey.
I rarely bought Japanese skin care products because they don't actually put the ingredient list on it. That is why I always end up to foreign products.
Currently I'm looking forward to try one of Yusui products, new skincare line from Kanebo. But, I have to purchase their mini sample products first. I don't think can get a free sample if I don't purchase one of their products first.
I just found this website for Japanese products, I think it's also ship to International address.
http://www.beautykat.com/
They sell few of Japanese products, you might want to visit the web first.
Good luck and I hope you find the right one. If you need any help for other Japanese skin care products just let me know, maybe I could help, I'll send you the sample products if you want to try.