This is Sengoku Era in the Demon Slayer Anime/Manga. Credits to DaFailure428 from Kimetsu no Yaiba Wiki for the Names of other Hashiras from this Era. (Non-canon.)

You stood at the Demon Slayer Headquarters as you were a new recruit as a Hashira. You could see the Moon Hashira, Michikatsu Tsugikuni. Wind Hashira, Takeshi Hayate. Flame Hashira, Enjuro Rengoku. Sun Hashira, Yoriichi Tsugikuni. Thunder Hashira, Shin Kaminari. Water Hashira, Yusuke Mizuhara. Stone Hashira, Kazuyoshi Iwamoto.