Otherworldly Munchkin

• Ja Kanji — 異世界マンチキン ―HP1のままで最強最速ダンジョン攻略― • Ja Romaji — Isekai Manchikin: HP 1 no Mama de Saikyō Saisoku Danjon Kōryaku • Genre — * Comedy • Isekai

• Type — manga • Author — Yū Shimizu • Illustrator — Makoto Aogiri • Publisher — Kodansha • Imprint — Sirius KC • Magazine — Suiyōbi no Sirius • First — February 5, 2019 • Volumes — 14

• Type — tv series • Director — * Mamoru Yokota (chief) • Kei Yoshimizu • Naoya Fukushi • Writer — Hiroshi Hosokawa • Music — Asami Tachibana • Studio — Durandal • Licensee — Crunchyroll Otherworldly Munchkin: Let's Speedrun the Dungeon with Only 1 HP! is a Japanese manga series written by Yū Shimizu and illustrated by Makoto Aogiri. It has been serialized online via Kodansha's Niconico-based Suiyōbi no Sirius manga service since February 2019 and has been collected in fourteen tankōbon volumes. An anime television series adaptation produced by Durandal has been announced.

Yukito Kirihara is a high-school student who loves tabletop role-playing games. He gets reincarnated into Everworld, a fantasy world with swords and magic alongside his sister, who goes missing after being reincarnated. Yukito has a curse that makes his HP limit one, meaning that any damage can instantly kill him. Using a book he stole from the evil goddess Nephilia, he exploits loopholes in the rules of the world and other tricks to defeat his enemies. Yukito's fighting style resembles the munchkin style of pursuing optimal solutions.

• Yukito Kirihara • Kazuki Ura • Sharurotte R. Buraunia • Kana Yūki • Lumilia Sherwood • Yui Ishikawa • Riveruna Dāku • Kaori Maeda • Sana Kirihara • Hika Tsukishiro • Roshinante • Fukushi Ochiai • Mānagarumu • Ayasa Itō • Nephilia Curse • Yoko Hikasa • World Book / Narrator • Anri Katsu

Written by Yū Shimizu and illustrated by Makoto Aogiri, Otherworldly Munchkin: Let's Speedrun the Dungeon with Only 1 HP! began serialization on the Kodansha's Niconico-based Suiyōbi no Sirius manga service on February 5, 2019. Its chapters have been collected into fourteen tankōbon volumes as of May 2026. The series is licensed by Kodansha for digital-only English publication.

An anime television series adaptation was announced on November 6, 2024. It is produced by Durandal and directed by Kei Yoshimizu and Naoya Fukushi, with Mamoru Yokota designing the characters alongside Yui Katō while also serving as general director, Hiroshi Hosokawa handling series composition, and Asami Tachibana composing the music. The series was originally scheduled for October 2025, but was later delayed in order to "improve the quality" of the anime series. Crunchyroll will stream the series.