Webdemon slayer's anime still has a ways to go before it ends, and as tanjiro's journey continues, he will only meet more and more interesting figures. While not all are. Webtanjiro's age as demon slayer's shonen protagonist. When demon slayer 's story begins, in chapter/episode 1, tanjiro kamado is 13 years old, which is younger. Webdepending on how much time passes as the anime continues, tanjiro could be a couple of years older by the time it concludes. But how does his age compare to. Webhowever, throughout demon slayer‘s first and second season, the boy is 15 years old, which is still a very young age for the heavy duties he’s taken on. Webin the current season of the demon slayer anime (season 4), tanjiro is 16 years old. At the start of the series, when tanjiuro’s family is first massacred by the. Webtanjiro kamado’s journey in demon slayer reflects a classic shonen narrative of personal growth, but with a unique twist. His early training may have been. Tanjiro's growth was slow but significant, reaching his full potential in season 3 and 4. Hashira training expanded tanjiro's fighting style with new. Webtanjiro's extraordinary combat prowess and superhuman physical attributes allowing him to overpower rui, a member of the twelve kizuki.