NEC Ergofit Keyboard
The NEC PK-KB015 keyboard, aka Ergofit(M) keyboard, was released in 1998. It was last model of M-System before NEC stopped promoting M-System.
〔see NEC M-System keyboards History〕

Note that the vowels {E, U, I, A, O} are all on the left hand home row.




Reference
- 〔Launch of “Ergofit Keyboard” By NEC. At http://www.nec.co.jp/press/ja/9809/2401.html〕