The History of the Improvement of Koi Raising Techniques and the Future prospects.

 This article by the legendary Dr. Kuroki was written many years ago and make fascinating reading 

Dr I. A. K. Kuroki is a founder of the ZNA, past chairman of this organization and held an executive position of the Z. N. A. until his death last month. This is an article written by Dr. Kuroki in 1991 and makes fascinating reading on his views of the history of koi raising techniques.