Set the os keyboard input language to the Japanese array
These actions must be signed in with a user with administrative rights.
Start Registry Editor first. Show the charm and select Search.
Enter regedit in the search field and start by selecting regedit.exe. In Windows 7 and Windows Vista, type regedit in the program input field that appears when you open the Start menu.
You are prompted for administrative rights, so select Yes.
After you start Registry Editor, select the following folder from the tree on the left:
If you make an incorrect change, back up so that you can revert to the previous state. Select File from the menu and select Export.
Save it anywhere.
You have backed up the Parameters registry. You can double-click this file to return to the state it was exported to.
Change the registry. From the list of parameters on the right, double-click LayerDriver JPN or right-click and select Fix. If there are no items, right-click the blank and select "New" - "String Value".
When the dialog appears, change the value to kbd106.dll and click the OK button.
Then open OverrideKeyboardIdentifier in a similar manner and change the value to PCAT_106KEY.
Open OverrideKeyboardType and change the value to 7.
These changes will take effect after you restart Windows, so restart Windows and check your keyboard.