Tanjiro's determination and perseverance in his demon-slaying journey are significant for several reasons. Firstly, his unwavering resolve and persistence showcase his strong willpower and commitment to his goals, inspiring others around him to never give up in the face of adversity. Secondly, his determination allows him to overcome seemingly insurmountable challenges and obstacles, making him a formidable and respected demon slayer. Lastly, Tanjiro's perseverance symbolizes his growth and development throughout his journey, highlighting his transformation from a novice into a skilled and capable demon slayer. Overall, Tanjiro's determination and perseverance are essential qualities that not only drive his personal journey but also serve as a source of motivation for those around him.