The Ossan Newbie Adventurer

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.) 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, who have published thirteen volumes since December 2018 under their 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 nine tankōbon volumes. An anime television series adaptation produced by Yumeta Company premiered in July 2024.

Characters

 * Rick Gladiator (リック・グラディアートル)
 * 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.
 * 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)
 * Reanette is a dark elf and Rick's assistant and companion. Despite her demure and calm behavior, she is a powerful member of Orichalcum Fist, the greatest party of S-ranked adventurers in the world.
 * Reanette is a dark elf and Rick's assistant and companion. Despite her demure and calm behavior, she is a powerful member of Orichalcum Fist, the greatest party of S-ranked adventurers in the world.


 * Broughston Ashorc (ブロンストン・アッシュオーク)
 * 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.
 * 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)
 * 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.
 * 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.


 * Alicerette Draqul (アリスレート・ドラクル)
 * At ten years old, Alicerette earned a reputation as the most powerful genius vampire mage. She is a member of Orichalcum Fist, known as "The Demon Child of Devastation". She is also one of Rick's trainers.
 * At ten years old, Alicerette earned a reputation as the most powerful genius vampire mage. She is a member of Orichalcum Fist, known as "The Demon Child of Devastation". She is also one of Rick's trainers.


 * Angelica Diarmuit (アンジェリカ・ディルムット)
 * 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, they are acting high, mighty, and pompous, but she becomes a loyal ally to Rick.
 * 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, they are acting high, mighty, and pompous, but she becomes a loyal ally to Rick.


 * Raster Diarmuit (ラスター・ディルムット)
 * 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 at Reanette, only to fail. He even attempts to derail Rick's exams.
 * 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 at Reanette, only to fail. He even attempts to derail Rick's exams.


 * Freed Diarmuit (フリード・ディルムット)
 * 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.
 * 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)
 * Linx is a B-ranked examiner for the adventurer's guild. He becomes fast friends with Rick because he is also a late bloomer like him.
 * Linx is a B-ranked examiner for the adventurer's guild. He becomes fast friends with Rick because he is also a late bloomer like him.


 * Kelvin Urwolf (ケルヴィン・ウルヴォルフ)


 * Geese Resurrect (ギース・リザレクト)


 * Snape Resurrect (スネイプ・リザレクト)


 * Alisa Granger (アリサ・グレンジャー)
 * Alisa is Rick's junior during his days as a clerk at the adventurer's guild.
 * Alisa is Rick's junior during his days as a clerk at the adventurer's guild.

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 January 2024, thirteen 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 nine tankōbon volumes as of March 2024.

Anime
An anime adaptation was announced on March 31, 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 premiered on July 2, 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), performed by Akira Kushida, while the ending theme song is "Sagashimono" (さがしもの), performed by Chiai Fujikawa. Crunchyroll licensed the series. Muse Communication licensed the series in South and Southeast Asia.