Tanjiro's father, Tanjuro Kamado, was extremely strong and skilled, possessing abilities on par with the elite Demon Slayer Hashira. He mastered the legendary Sun Breathing technique, which is the original and most powerful breathing style in Demon Slayer lore. Despite his sickly appearance, he demonstrated extraordinary combat skills such as the "Transparent World" ability that allows heightened perception of opponents' movements and the "Selfless State" which enhances fighting abilities by suppressing personal fears and desires. He was strong enough to face giant threats like a massive bear while sick and could maintain the intense Sun Breathing dance ritual from sunset to sunrise, showing immense stamina. While he was likely not as skilled as the strongest Demon Slayer Yoriichi Tsugikuni, he was close and possibly capable of handling high-level demons, though perhaps lacking some combat experience and a Nichirin sword to finish demons. His strength was so notable that he is considered the closest to Yoriichi's level among known Demon Slayers, with suggestions he could have taken on powerful threats like Muzan or Upper Moon demons under different circumstances. However, his illness limited his fighting opportunities, and he did not fight demons officially.