This addon adds "Flame Breathing(炎の呼吸 Honō no kokyū)", "Dance of the Fire God(ヒノカミ神楽 Hinokami kagura)" and "Akaza's Blood Demon Art(猗窩座の血鬼術 Akaza no kekkijutsu)". It also added two "Nichirin blades(日輪刀 Nichirin Tō)". The language is in Japanese at the moment, but I'll update English supportive version for "ver.2" soon.
Tanjiro's Nichirin Blade
Dance Clear Blue Sky
Kyojuro's Nichirin Blade
First Form: Unknowing Fire Second Form: Rising Scorching Sun Third Form: Blazing Universe Fourth Form: Blooming Flame Undulation Fifth Form: Flame Tiger Ninth Form: Rengoku
Akaza's Blood Demon Art
Compass Needle Air Type Disorder Annihilation Type