Designed by the court painter Kose-no-Kanaoka (巨勢金岡) or possibly the artist Kudara-no-Kawanari (百済河成 782-853), the pond was inspired by Dongting Lake (洞庭湖) in China.
The entire gardens were landscaped to be enjoyed from boats on the pond.
Ōsawa-no-ike was most probably dug some time from 814, when Emperor Saga (嵯峨天皇 786-842) began work on a sprawling palace that would act as his seat of power in retirement.
The pond was part of "Saga-in's" (離宮嵯峨院) vast garden, intended primarily as a boating lake.