An Alps "compact tenkeyless" layout with color coded JP alphas and 2 thumb keys. With a little remapping (or maybe not, I'm not sure) it'd make a great daily driver.
I saw a very nostalgic keyboard.
The keyboard in this article is Reudo Rboard for Mac, not Pro. It has the same structure as ASKeyboard and Dboard.
In addition to this, there is the Reudo Rboard Pro series, which uses a leaf spring switch made by Fujitsu.