Kim Jang-saeng (, July 8 1548 - August 3 1631) was a Korean scholar, writer, politician, and Neo-Confucian philosopher of the Joseon period. His penname was Sagye (사계, 沙溪).
His courtesy names were Huiwon () and Huiji () .
Family
grandfather : Kim Ho (김호, 金鎬) father : Kim Gye-hui (김계휘, 金繼輝) mother : Lady Shin, Pyeongsan clan (평산 신씨, 平山申氏) wife : Lady Cho, Changnyeong clan (창녕조씨) Son : Kim Jip Son : Kim Ban, father of Kim Ikhun and grandfather of Kim Manjung
Works
Sagyejeonseo (사계전서, 沙溪全書) Gyeongseopanui (경서판의) Garyejimnam (가례집람, 家禮輯覽), Exposition of Family Rites Sangryebiyo (상례비요, 喪禮備要) Geunsarokseokui (근사록석의, 近思錄釋疑) Gyeongseobyeonui (경서변의, 經書辨疑) Songganghaengrok (송강행록, 松江行錄) Sagyeyugo (사계유고, 沙溪有故)