// modpack server guide
Kimetsu no Yaiba server hosting & setup guide
A Kimetsu no Yaiba server needs Java 17 and about 2.5–3.5 GB of RAM for up to 8 players.
Kimetsu no Yaiba is a Modpack based on the Anime/Manga "Demon Slayer" by Koyoharu Gotouge.
Summary from Kimetsu no Yaiba (Demon Slayer) on Modrinth.
Kimetsu no Yaiba (Demon Slayer) is a Forge modpack for Minecraft 1.20.1 (older versions go back to 1.16.5) with 56 mods, 42 of which run on the server. We'd pick our Standard plan (4 GB) for it.
Quick facts
| Loader | Forge |
|---|---|
| Minecraft versions | 1.20.1, 1.16.5 |
| Java needed | Java 17 for Minecraft 1.20.1Older pack versions: Java 8 for 1.16.5. Java version chart. |
| Mods | 42 run on the server56 in the pack. The other 14 are client-only, and the server skips them. |
| RAM | About 2–3 GB for 1–3 playersBy player count. |
| Downloads | 375,813 on Modrinth |
| Last updated | October 1, 2026 (version 2.1.3) |
| First published | June 28, 2024 on Modrinth |
| Server support | Required: the pack has mods that must run on the server. |
| Server pack | KimetsuNoYaiba(Demon-Slayer)+Server-[2.1.3].zipOfficial server pack on CurseForge, for KimetsuNoYaiba(Demon-Slayer)-[2.1.3], the same version Modrinth has. Checked October 5, 2026. |
| Modrinth tags | adventure, combat, kitchen-sink |
Kimetsu no Yaiba server files
Yes, on CurseForge. Modrinth has no separate server pack for Kimetsu no Yaiba, but the authors publish one on CurseForge: KimetsuNoYaiba(Demon-Slayer)+Server-[2.1.3].zip, for KimetsuNoYaiba(Demon-Slayer)-[2.1.3] (October 1, 2026). That's the same version Modrinth has.
How much RAM does a Kimetsu no Yaiba server need?
| Players online | RAM | DSN plan |
|---|---|---|
| 1–3 players | About 2–3 GB | Standard (4 GB) |
| 4–8 players | About 2.5–3.5 GB | Standard (4 GB) |
| 9–15 players | About 3–5 GB | Premium (8 GB)Standard (4 GB) can do if players stay close. |
Estimated from 42 mods on the server with our RAM calculator, not measured: low end if players stay together, high end if they spread out.
Set Java's heap (-Xmx) 10–15% under the RAM you have, about -Xmx3500M on 4 GB. Forge 1.20.1 reads it from user_jvm_args.txt: uncomment the -Xmx line. RAM guide.
Kimetsu no Yaiba server requirements
| Java | Java 17 |
|---|---|
| Loader | Forge for Minecraft 1.20.1 |
| CPU | Fast single-core speed (one main thread). |
| RAM | About 2–5 GB for 1–15 players (table above) |
| Disk | The server files, a growing world and backups |
| Network | TCP port 25565 open to players |
Recommended plan
Our pick for Kimetsu no Yaiba
Standard
4 GB RAM · planned launch price $16/month
At about 42 Forge mods this is a light pack, so 4 GB of RAM covers it for a small group.
Ordering is closed until we relaunch. We aren't taking orders or payments while we move to new hardware. Join the launch list and we'll email you when Standard servers open.
More than 8 players, or lots exploring at once? Go up to Premium (8 GB). Not sure? Email hello@dsnservers.com.
Planned launch price in USD, billed monthly once ordering opens, with a 7-day refund window.
How to make a Kimetsu no Yaiba server on your own PC
What's specific to Kimetsu no Yaiba, step by step. The full walkthrough for any pack: how to make a modded Minecraft server.
- Install Java 17.
Check with
java -version. Java version chart. - Get the server files.
Download the official server pack,
KimetsuNoYaiba(Demon-Slayer)+Server-[2.1.3].zip, from CurseForge and unzip it into an empty folder. - Start it and accept the EULA.
Run the start script in the server files, or the
run.sh/run.batthe Forge 1.20.1 installer writes, then seteula=trueineula.txtif you accept Mojang's EULA (EULA step). - Set the RAM with
-Xmx, sized from the table above. - Let friends connect: forward TCP 25565, or use a tunnel or host behind CGNAT (can't connect?).
Or run Kimetsu no Yaiba on DSN
Once we relaunch (join the launch list), on DSN you'd install Kimetsu no Yaiba from the panel's Modrinth modpack installer (version 2.1.3), pick Java 17 on the Startup tab and accept the EULA in the console. No port forwarding.
How to play Kimetsu no Yaiba with friends
Each player installs Kimetsu no Yaiba version 2.1.3 with the Modrinth App or Prism Launcher, the same version as the server, and adds the server's address under Multiplayer.
Different versions of Kimetsu no Yaiba on the server and a client show up as Mismatched mod channel list or mod rejections. Why friends can't join, timeouts included.
Lag and performance on Kimetsu no Yaiba
Can't keep up! Is the server overloaded? means ticks take longer than 50 ms; more RAM won't fix that once Kimetsu no Yaiba has enough (tick lag guide). For Kimetsu no Yaiba:
- Measure first: spark's
/spark tpsand profiler work on 1.20.1 and name the mod or machine using the tick time. - Distances:
view-distance=8and a lowersimulation-distanceinserver.properties. - Pre-generate: Chunky for 1.20.1,
/chunky radius 3000then/chunky start, before people explore.
Common Kimetsu no Yaiba crashes
What a Forge 1.20.1 server running Kimetsu no Yaiba hits most. For any other error, paste the log into the free crash log analyzer.
- Wrong Java version. Kimetsu no Yaiba on Minecraft 1.20.1 needs Java 17. Started on Java 8, it stops with
UnsupportedClassVersionError: ... class file version 61.0, this version of the Java Runtime only recognizes class file versions up to 52.0. Java version fix. - Out of memory. Kimetsu no Yaiba (42 mods on the server) needs about 2–3 GB for 1–3 players;
java.lang.OutOfMemoryErrormeans it ran out. Out-of-memory fix. - Client-only mod on the server. Kimetsu no Yaiba includes 14 client-only mods, which a server install skips; copying a player's mods folder brings them back and stops the server. Check a mods list with the client-or-server-side checker. Client-only mod fix.
- After adding or updating a mod. Mods you add to Kimetsu no Yaiba by hand usually crash it with a missing dependency or a mixin conflict.
- Ticking entity or block entity. The crash report names it and gives its coordinates. Ticking entity fix.
Updates and support
Before moving Kimetsu no Yaiba past version 2.1.3, back up the world: see updating a modpack server without losing your world.
Bugs in Kimetsu no Yaiba itself go to its authors: Discord. Server problems on DSN: hello@dsnservers.com or Discord.
Packs like Kimetsu no Yaiba
More: all modpack guides and how to make a modded server.
Run Kimetsu no Yaiba on DSN when we relaunch.
Our pick, Standard: 4 GB, planned at $16/month.
DSN Servers isn't affiliated with Kimetsu no Yaiba (Demon Slayer) or Modrinth. The pack's icon, summary and stats come from Modrinth's public API (checked October 4, 2026).