Kensuke is a Japanese given name of unknown origin, though it's believed to mean "healthy" or "strong". It consists of two kanji characters: 健 (ken, meaning healthy) and 介 (suke, meaning mediate). The name has gained some international popularity due to its use in certain anime and manga series.
"Kensuke was a moderately popular name for newborns over the past four decades, with an uptick in usage around the late 90s and early 2000s."