Kukcho () was a temple name given to one of the ancestors of King Taejo of Goryeo. The identity of this ancestor varied depending on the source, with the official history of Goryeo, the Goryeosa, stating that it was his great-great-grandfather, Kang Poyuk.
According to ' and ', the identity of Kukcho was Kang Poyuk.
Kang Poyuk was the son of Kang Ch'ung. He had two brothers named as Ijegà Ân and Posà Âng. Kang Poyuk married his niece Kang Tà Âkchu, the daughter of his brother Ijegà Ân, and their daughter Kang Chinà Âi was born. Chinà Âi would be the mother of Chakchegà Ân, the grandfather of King Taejo.
Later period Goryeo individuals questioned the identification of Poyuk as Kukcho. Yi Chehyà Ân questioned the fact that Poyuk, who was traditionally portrayed as not being a direct male ancestor of the House of Wang, was given a temple name rather than his son-in-law, Taejo's paternal great-grandfather. Yi believed that Kukcho could not have been Poyuk as he was not a direct male ancestor of the House of Wang. He pointed out that in the Wangdae Chongjokki (Genealogical Record of the Wang Dynasty), a now-lost work, that the temple name Kukcho was given to the great-grandfather of Taejo, the husband of Chinà Âi. While traditionally her husband was Suzong of Tang, this was already in dispute by the late Goryeo period.
During the late Goreyo period, Yi Saek would claim that that Kukcho was instead Kang Hogyà Âng instead of Poyuk.