He was born into a peasant family in TĂ¶mĂ¶rkĂ©ny. After graduating from training collage in KiskunfĂ©legyhĂˇza, he began teaching at a school in FelsĹ‘pusztaszer. He lived in a community of Tanya people and was involved in the cultural and political life of the village.
He met Ferenc MĂłra during his ethnography field work. In one of his letters, MĂłra wrote the following about education of the peasantry: "I can name three teachers to whom I owe gratitude as archaeologists: one of them was Lajos Hock from Dorozsma, the other was IstvĂˇn Kiss from KĂ©tegyhĂˇza, and the third was JĂˇnos Jaksa from Pusztaszer.â€ť (Ferenc MĂłra: VĂ©reim. Parasztjaim. 1958. 218.)
He married AmĂˇlia Vangel, a teacher in Pusztaszer, in 1937. They had three children. He was transferred to Balmok, then to SzegvĂˇr in 1944 where he taught until his retirement. The first ethnographic and local history exhibition in the village, the Village Museum, opened due to his tiresome work in 1948. A street was named after him after the change of social system in Ăšjfalu, SzegvĂˇr.