tanjiro was getting fire wood tanjiro quit being a demon slayer to watch his son once kanji was 13 he started training him the 11 water breathing forms unlike tanjiro kanji had a incredibly great sense of hearing and sight tanjiro trained kanji the same way as urokodaki trained him but not throwing knifes and tree logs at him three years later he master the 11 water breathing forms but tanjiro din't send him to the final selection but tanjiro had a thought inosuke and zenitsu live close by and kanao train kanji in the flower breathing form so he ask zenitsu to trained him in the thunder breathing form and inosuke trained him the breath of the beast style so he had made new breathing form the deadly sins was what it was called at kanji 17 birthday tanjiro got kanji a demon slaying sword after kanji took the sword cover off and and it turned green whoa that color has never before