Support JIS Keyboard Layout
Both in-app and beta applications do not support JIS keyboard.
(JIS = Japanese version of Mac keyboard)
For RD for Mac, it seems that you are using a different PC keyboard from Apple.
Beta version 8.2.9 was fully compatible with Japanese input. It has become so that Japanese input can not be done by upgrading somewhere after that.
(8.2.9 japanese input see => http://fanblogs.jp/macyarounanoka/archive/185/0 )
On the Mac's JIS keyboard there are EISUU keys and KANA keys. This is the key to switch between English input mode and kana input mode.
Please be able to use these keys in Windows.