How many Demon Slayer Arc's are left?

Determining the exact number of Demon Slayer arcs remaining after the Hashira Training arc is tricky, as Koyoharu Gotouge, the series' creator, hasn't explicitly confirmed what lies ahead. However, by analyzing existing information and patterns, we can make some educated guesses.

Current Standing:

• As of January 2, 2024, the manga concluded with 12 published arcs and an additional final arc split into two parts.
• The anime has adapted nine of these arcs (Tanjiro Kamado: Nezuko Kamado Slayer – Swordsmith Village), with the Hashira Training arc likely covered in Season 7.

Remaining Content:

• The final two parts of the manga, "Infinity Fortress Arc" and "Sunrise Hashira Training Arc," remain unadapted for anime.
• These final arcs explore Tanjiro's further training, the climactic battle against Muzan Kibutsuji, and the aftermath of the Demon Slayer Corps' struggle.

Potential Additional Arcs:

• While currently unconfirmed, some fans speculate Gotouge might revisit the Demon Slayer universe through potential prequel arcs focusing on other Hashira or side characters.
• However, official confirmation of such arcs is lacking, and speculating on their existence wouldn't be accurate within the scope of the currently published material.

Therefore, with confirmed material:

• 2 arcs remain for anime adaptation (Infinity Fortress & Sunrise Hashira Training).

Considering potential additions:

• 2+ arcs are a possibility, depending on Gotouge's future plans and any prequel content announcements.

Important Caveats:

• Production schedules and pacing might alter the number of anime seasons covering the remaining arcs.
• Gotouge could potentially introduce filler arcs or original anime content, further adjusting the arc count.

Conclusion:

While pinpointing the exact number of Demon Slayer arcs after the Hashira Training arc remains elusive, we can confidently expect at least two more arcs adapted for anime based on existing manga content. Further arcs in the form of prequels or additional stories are a possibility, but speculation without official confirmation wouldn't provide a reliable answer.

The best way to discover the future of Demon Slayer arcs is to follow Gotouge's announcements and enjoy the anime's adaptation as it unfolds. The thrilling adventures of Tanjiro and his comrades are far from over, and future arcs promise captivating battles, emotional resolutions, and perhaps even a glimpse into the lives of other Demon Slayers waiting for their stories to be told.  

I hope this breakdown provides a clear understanding of the remaining Demon Slayer arcs and fuels your excitement for the anime's future chapters!