Hashira Training Arc

The Pillar Training Arc is the tenth arc of Kimetsu no Yaiba.

Synopsis
The Pillar Training conducted by the Pillars is a special training session that aims to improve all Demon Slayers' abilities and physical health. The training is split between the Pillars. First, the Sound Pillar, Uzui Tengen conducts training on basic stamina. Then, the Love Pillar, Kanroji Mitsuri handles flexibility training and the Mist Pillar, Muichirou Tokito, deals with the quick movement training.

The Snake Pillar, Obanai Iguro, then focuses on sword skill revision, followed up by the Wind Pillar, Sanemi Shinazugawa, who handles pounding training and finally the Rock Pillar, Gyomei Himejima, who trains muscle reinforcement. The Insect Pillar, Shinobu Kocho does not take part in the training.

The majority of the Demon Slayers view the training session as an everlasting trip in hell, with the exception of Tanjiro Kamado and Inosuke Hashibira who see the session as a chance to improve themselves. As a general rule, Pillars must take part in each other's training sessions. It is considered a win-win situation for both the Pillars and the Demon Slayers as even the Pillars get to improve due to being constantly attacked by wave upon wave of juniors ranked lower than themselves.

Battles & Events
A fight occurred between the Wind Pillar and Tanjiro when the latter defended Genya against his older brother. Tanjiro was banned from Sanemi's training sessions and prohibited from approaching him in the future.