The Ossan Newbie Adventurer, Trained to Death by the Most Powerful Party, Became Invincible (新米オッサン冒険者、最強パーティに死ぬほど鍛えられて無敵になる。, Shinmai Ossan Bōkensha, Saikyō Pāti ni Shinu Hodo Kitaerarete Muteki ni Naru) is a Japanese fantasy light novel series written by Kiraku Kishima and illustrated by Tea. It began serialization online on the user-generated novel publishing website Shōsetsuka ni Narō, and it moved to the Kakuyomu website in June 2018. It was later acquired by Hobby Japan, which has published seventeen volumes since December 2018 under its HJ Novels imprint. A manga adaptation with art by Ken Ogino has been serialized online via Hobby Japan's Comic Fire website since November 2019 and has been collected in thirteen tankōbon volumes. An anime television series adaptation produced by Yumeta Company aired from July to September 2024.
Contents
Plot
In a fantasy world where adventurers typically start in their teens, 30-year-old guild receptionist Rick Gladiatol quits his job to pursue his dream of defeating the legendary monster, Kaiser Alsapiet. He is taken in by Orichalcum Fist, the continent's strongest S-rank party, and undergoes two years of near-fatal training. This brutal regimen grants him S-rank combat capabilities. However, because he only measures himself against his god-like mentors, Rick develops severe imposter syndrome, genuinely believing he is weak. [1, 2, 3, 4, 5]
At age 32, Rick takes the registration exam, where his immense power accidentally shatters the testing equipment and effortlessly defeats an elite noble prodigy. Registering as a novice F-rank adventurer, Rick takes on low-level chores while completely oblivious to his own strength. He is soon dragged into his mentors' quest to gather rare magical jewels needed to find Kaiser Alsapiet, forcing the clueless rookie to enter a prestigious martial arts tournament and continuously humble the world's highest-ranking elites. [1, 2, 3]
Characters
Orichalcum Fist
Rick Gladiator (リック・グラディアートル, Rikku Guradiātoru)
Voiced by: Takuya Satō (Japanese); Aaron Campbell (English)
Rick is a former clerk at an adventurer's guild who starts off on his adventuring career by enrolling in the adventurer's guild's examinations, despite being 32 years old. He is underestimated due to his age; but people do not know that he was trained by the greatest group of adventurers in the world, making him stronger and more powerful than the average F-rank.
Reanette Elfelt (リーネット・エルフェルト, Rīnetto Eruferuto)
Voiced by: Saori Ōnishi (Japanese); Dani Chambers (English)
Reanette is a half-dark elf, half-elf and Rick's assistant and companion. Despite her demure and calm behavior, she is known as "The Guillotine Swordmaiden", a powerful member of Orichalcum Fist, the greatest party of S-ranked adventurers in the world. She is open to her feelings when it comes to Rick and falls in love with him.
Broughston Ashorc (ブロンストン・アッシュオーク, Buronsuton Asshuōku)
Voiced by: Kenta Miyake (Japanese); Brian Mathis (English)
Broughston is a warrior-monk orc and the leader of Orichalcum Fist, known as "The Sage Beast" because of his monstrous physique and intelligence to match. He is one of Rick's trainers.
Mizett Eldwarf (ミゼット・エルドワーフ, Mizetto Erudowāfu)
Voiced by: Toshiyuki Toyonaga (Japanese); Mark Allen Jr. (English)
The young-looking half-elf, half-dwarf (but over 50 years of age), Mizett is a member of Orichalcum Fist nicknamed "The Thousand-year Workshopper" because of his reputation as the greatest weapons craftsman in the world, with skills that are millennia ahead of his time. He is one of Rick's trainers.
Other characters
Angelica Diarmuit (アンジェリカ・ディルムット, Anjerika Dirumutto)
Voiced by: Shino Shimoji (Japanese); Marisa Duran (English)
A B-ranked knight second-rank, and the second eldest of the three siblings of the royal Diarmuit Family who dueled Rick to a loss, and she owes Rick the chance to call her his servant due to the loss. Like all of the Diarmuit siblings, she acts high, mighty, and pompous, but she becomes a loyal ally to Rick.
Raster Diarmuit (ラスター・ディルムット, Rasutā Dirumutto)
Voiced by: Ryōhei Kimura (Japanese); Joshua Waters (English)
Raster is the eldest of the three Diarmuit siblings. Due to his A-rank, he is an examiner for the adventurer's guild. He tried hitting on Reanette, only to fail. He even attempts to derail Rick's exams.
Freed Diarmuit (フリード・ディルムット, Furīdo Dirumutto)
Voiced by: Shinnosuke Tokudome
The youngest of the three Diarmuit siblings who is taking the exam, but is known as a child prodigy with C-rank abilities. He got irritated when he finds out Rick is outperforming him in all of the preliminary exams.
Linx Laulot (リンクス・ローロット, Rinkusu Rōrotto)
Voiced by: Ryuuho Nagaoka
Linx is a B-ranked examiner for the adventurer's guild. He becomes fast friends with Rick because he is also a late bloomer.
Kelvin Urwolf (ケルヴィン・ウルヴォルフ, Keruvuin Uruvuorufu)
Voiced by: Katsuyuki Konishi
Media
Light novel
Written by Kiraku Kishima, The Ossan Newbie Adventurer, Trained to Death by the Most Powerful Party, Became Invincible began serialization as a web novel published on the user-generated novel publishing site Shōsetsuka ni Narō, before moving to the Kakuyomu website on June 1, 2018. It was later acquired by Hobby Japan, who began publishing it as a light novel with illustrations by Tea under their HJ Novels imprint on December 22, 2018. As of February 2026, seventeen volumes have been released.
Manga
A manga adaptation illustrated by Ken Ogino began serialization on Hobby Japan's Comic Fire manga website on November 22, 2019. Its chapters have been collected in thirteen tankōbon volumes as of May 2026. The manga is licensed in English by One Peace Books.
Anime
An anime adaptation was announced in March 2023. It was later revealed to be a television series, produced by Yumeta Company and directed by Shin Katagai, with scripts written by Kasumi Tsuchida, character designs handled by Mari Eguchi, and music composed by Tomotaka Ōsumi. The series aired from July 2 to September 24, 2024, on TV Tokyo and other networks. The opening theme song is "Arano ni Sake yo Bōkensha-tachi" (荒野に咲けよ冒険者たち; lit. 'Bloom in the Wasteland O Adventurers') performed by Akira Kushida, while the ending theme song is "Sagashimono" (さがしもの; Lit) Looking for Something performed by Chiai Fujikawa. Crunchyroll streamed the series. Muse Communication licensed the series in South and Southeast Asia.