Kenko was on friendly terms through literature with Sadayo (Ryoshun) IMAGAWA, who was the Kyushu Tandai (a local commissioner of the Kyushu Region) for Muromachi bakufu (Japanese feudal government headed by a shogun).
室町幕府の九州探題である今川貞世（了俊）とも文学を通じて親交があった。