Isekaigaeri no Daikenja-sama wa Soredemo Kossori Kurashiteiru Tsumori desu

***Isekaigaeri no Daikenja-sama wa Soredemo Kossori Kurashiteiru Tsumori desu*** (異世界帰りの大賢者様はそれでもこっそり暮らしているつもりです, The Great Sage Who Returned from Another World Wants to Live Quietly) is a Japanese light novel series written by Kino, Nikyuu with illustrated by Kusaka Kou and is based on the Web novel of the same name. The light novel series was adapted into a manga series with illustrations by Okazaki, Junpei and serialized by *Young Magazine (Monthly)*, with 3+ volumes released as of August 19, 2021.

## Synopsis

At the age of 15, Saitou is reincarnated into another world, becomes a great sage, and defeats the Demon King. Immediately afterward, a door connecting the other world and the real world opens, and Saitou returns to Japan with the power of a great sage. However, 19 years have passed in Japan. Chronologically preserved, Saitou meets his childhood friend, Kanako, who is now a single mother. It seems that there is an enemy who is aiming for Kanako's life... The slow-life wannabe story of a great sage who came back from another world begins!

(Source: Kodansha, translated)

## List of Published Books

### *Novel*

Kino, Nikyuu (Author) / Kusaka Kou (Illustrator) "Isekaigaeri no Daikenja-sama wa Soredemo Kossori Kurashiteiru Tsumori desu" Kodansha <Became a Novelist>, 1 volume in total September 2, 2021.

1. Released date September 2, 2021 - ISBN 978-4-06-523831-8

LN Vol. 1
### *Manga*

Kino, Nikyuu (Original) / Kusaka Kou (Character Draft) / Okazaki, Junpei (Illustrator), "Isekaigaeri no Daikenja-sama wa Soredemo Kossori Kurashiteiru Tsumori desu" Young Magazine <Kodansha>, 5+ volumes in total November 18, 2022.

1. Released date March 18, 2022 - ISBN 978-4-06-526582-6
2. Released date July 20, 2022 - ISBN 978-4-06-528480-3
3. Released date November 18, 2022 - ISBN 978-4-06-529790-2
4. Released date March 20, 2023 - ISBN 978-4-06-531072-4
5. Released date July 20, 2023 - ISBN 978-4065323816

Manga Vol. 1Manga Vol. 2Manga Vol. 3Manga Vol. 4Manga Vol. 5

## Saitou Tatsuya

### Aliases:

* Great Sage, Saitou
* Child prodigy
* Oyakata-sama/Don/Boss

### Affiliation:

* Youko Clan
* Kate Montblanchette *(Master)*

### Allied:

* Kanako Youko *(Childhood Friend)*
* Maya Youko *(Daughter of Kanako)*
* Dragon King Ngyah

## 「Biographical Information」

### Relatives:

* Unnamed Father
* Unnamed Mother
* Ryuuji Tatsuya

### Occupation:

* Great Sage
* Yakuza Leader

## 「Physical Description」

### Status:

Active

After being transported to another world at age 15, Saitou became a great sage, defeated the demon lord, and safely returned to Japan. Expecting to live a humble life in his hometown, he instead discovered that 19 years had passed. Not to mention after saving his beautiful former classmate (now a single mom) and helping Yokai, he finds himself drawing the attention of the mafia and modern-day Japan’s supernatural organizations.

While trying to solve his problems peacefully, the Yokai began to refer to him as Master, and the mafia and supernatural organizations started to call him things like "Oyakata-sama" by youkai, and "Don" or "Boss….. As his troubled days continue, it seems like he won’t be able to live a normal life.

### Abilities

Saitou is trained in another world by his teacher a Sage to support the hero to defeat the demon lord, he is skilled in magic and CQC martial arts. Because being transported and trained into the subspace of Infinite Corridor Book his mana is changed to limitless until he has the same dimension as the magic he can use his magic power.

Because his teacher's knowledge passes through to him, Saitou's technique on the battlefield is likened to a chessboard and the soldiers of chess pieces that have manifested fight. The chess pieces are not ordinarily summoned or create to aid him in the battle, these chess pieces can obliterate any opponent or they can save Saitou by healing or moving defensively.

Saitou, either can innately or through training, are masters of abstract strategy games, possessing a keen eye for details, and an unparalleled strategic mind. One of the common moves in Saitou's chessboard battle is called 「***chess opening***」 or simply an 「***opening***」 is the initial stage of a chess game but in real combat. Whether they are trying to gain the upper on the battlefield or to create dynamic imbalances, Saitou generally devotes a lot of attention in the opening stages to the following strategies:

* One of the main aims of the opening is to mobilize the pieces into useful squares where they will have an impact on the game. To this end, knights are usually developed to f3, c3, f6, and c6 (or sometimes e2, d2, e7, or d7), and both players' king and queen pawns are moved so the bishops can be developed (alternatively, the bishops may be *fianchettoed* with a maneuver such as g3 and Bg2). Rapid mobilization is the key. The queen, and to a lesser extent the rooks, are not usually played to a central position until later in the game when many minor pieces and pawns are no longer present.
* At the start of the battle, it is not clear which part of the board the pieces will be needed. However, control of the central squares allows pieces to be moved to any part of the board relatively easily, and can also have a cramping effect on the opponent. The classical view is that central control is best effected by placing pawns there, ideally establishing pawns on d4 and e4 (or d5 and e5 for Black).

* This board is has biggest advantage when Saitou used this in combat, it can deployed automatically by a command to any chess pieces.

## External Link

* *Isekaigaeri no Daikenja-sama wa Soredemo Kossori Kurashiteiru Tsumori desu* ― Web novel at Shōsetsuka ni Narō (in Japanese)
* *Isekaigaeri no Daikenja-sama wa Soredemo Kossori Kurashiteiru Tsumori desu* ― Web novel at Kakuyomu (in Japanese)
* *Isekaigaeri no Daikenja-sama wa Soredemo Kossori Kurashiteiru Tsumori desu* ― Official Manga Website (in Japanese)
* *Isekaigaeri no Daikenja-sama wa Soredemo Kossori Kurashiteiru Tsumori desu* ― Yanmaga | Website (in Japanese)
* *Isekaigaeri no Daikenja-sama wa Soredemo Kossori Kurashiteiru Tsumori desu* ― Nico-Nico Seiga | Website (in Japanese)