Stumbled across this website, with some interesting Ki-94-I stuff. Check out the PDF of the mockup review... some good photos.
http://www.geocities.jp/pinealguy/tatsuo/tatsuo.htm
Bigger version (lots bigger... this'n is scaled to 10%) of this drawing is there:
http://www.geocities.jp/pinealguy/tatsuo/tatsuo.htm
Bigger version (lots bigger... this'n is scaled to 10%) of this drawing is there: