Japanese Ergonomic Keyboard History

• 
  Thumb-Shift, 1980
• 
  NEC PC-8801-KI, 1983
• 
  NEC 文豪 Mini7, 1985
• 
  TRON, 1986
• 
  NEC M-system, 1990
• 
  NEC 文豪 Mini7RM, 1992
• 
  NEC PC-9801, 1992
• 
  NEC Ergofit, 1998
• 
  Scythe Ergo Diver, ~2003
• 
  μTRON, 2007
• 
  Esrille New

• NEC M-System keyboards History
• MSX Home Computer
• SANYO Medicom MC-KM5600B
• ALPS Kanji