Kumabe Chikayasu was a kokujin, or provincial landowner, in Higo Province during the Sengoku and Azuchi-Momoyama periods.  He served as the lord of Waifu Castle and the lord of Jōmura Castle.

Chikayasu was born as the son of Kumabe Chikanaga.  Chikanaga stationed him at Jōmura Castle.  At the time, he is surmised to have had landholdings of 1,900 chō.  When the Shimazu clan invaded Higo in the ninth month of 1584, on 9/14, he communicated via the Jō clan to propose surrender and, soon thereafter, he tendered a hostage and came under their command.  In the sixth month of 1587, after the end of the Subjugation of Kyūshū, he received recognition of his rights from Toyotomi Hideyoshi to a significantly smaller landholding of 900 chō.

In the same year, Chikayasu and his father launched a rebellion against their new landlord, Sassa Narimasa.  As a central figure of the Higo Kokujin Uprising, he orchestrated the rebellion in the northern portion of Higo.  Together with Yamaga Shigeyasu and Udō Kanemoto, he holed-up in Jōmura Castle, but at the end of the year, upon the advice of Ankokuji Ekei, he vacated the castle.  After surrendering, Chikayasu was tendered to the Mōri clan and, the following year, he and Udō Kanemoto were executed at Kokura in Buzen Province.