How to make Windows 7 match my Japanese MacbookPro keyboard layout?

Question

I have a Japanese MacbookPro. The keyboard looks like this :

I installed a Japanese Windows 7 on it, using Bootcamp.
Under Windows 7, the keyboard layout is not correct.
For example, when I press Shift + 9, the output is (, like if it where a US keyboard, while I would want it to be ), like with the normal Japanese keyboard layout.

How can I fix this behavior ?

Solution

I fixed my problem, thanks to the hints given in this thread on Microsoft answers.
I edited the registry value LayerDriver JPN changing it from kbd106.dll to kbd101.dll. It works well now !