The Principle of a Philosopher by Eternal Fool “Asley”


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When he was young, he had failed at the Magic Academy and was looked down by others.

However by chance, he discovered a mythological medicine, so he obtained an immortal body.

In order to get revenge on the people who made fun of him, he began researching magic and magical artifacts different from the academy. After 5000 years of research, he has become an ancient magic user before he noticed. 

The people he was seeking revenge were long gone, losing his purpose, Asley went on a journey to see the world after 5000 years with his familiar Pochi.

With an unexpected turn of events after helping many humans, he is now living at the magic academy.

A 5000 year old man with a young appearance Asley, how will he live his second life’s youth?

Associated Names
One entry per line
Yuukyuu no Gusha Asley no, Kenja no Susume
Related Series
Monogatari no Naka no Hito (2)
Ore wa LV99999, Shikashi, Ore no Tokei ga 1 (1)
The Last Surviving Alchemist Wants to Live Quietly in the City (1)
While Killing Slimes for 300 Years, I Became the MAX Level Unknowingly (1)
Perfect New Magician Enrolls in a Magic School in the World 1000 Years Later, the Legendary Strongest Magician (1)
Recommendation Lists
  1. Things i have read
  2. my awful taste
  3. Japanese Action Novels
  4. my favourites (mostly isekai though)
  5. jp novels (mostly isekai)

Latest Release

Date Group Release
04/16/21 Divine Dao Library c172
04/15/21 Divine Dao Library c171
04/09/21 Divine Dao Library c170
04/08/21 Divine Dao Library c169
04/02/21 Divine Dao Library c168
04/01/21 Divine Dao Library c167
03/26/21 Divine Dao Library c166
03/25/21 Divine Dao Library c165
03/19/21 Divine Dao Library c164
03/18/21 Divine Dao Library c163
03/12/21 Divine Dao Library c162
03/11/21 Divine Dao Library c161
03/05/21 Divine Dao Library c160
03/04/21 Divine Dao Library c159
02/26/21 Divine Dao Library c158
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11 Reviews sorted by

Nvelist rated it
April 6, 2018
Status: c6
I must say not bad. Although the title really indicate the MC is a fool. He is still smart, a strategist and calculated.

Always bantering with his familiar Siberian Husky Pochi but all fun and laughs even in the face of dangers.

A real slowpoke towards learning but never gives up even 5000 years passed.

I give this 8 out of 10 since MC is pretty slow towards change and realization. But still good as it gives a broader scene for him to regained his lost humanity of values, kindness, thoughtfulness, fairness and... more>> etc.. Over the 5000 years of his isolation from the rest of the world.

A worthy story. <<less
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YeYueLiang rated it
June 23, 2018
Status: c7
very funny.

I like the MC its not the typical good boy, also all indicate he Is a fool... I wait and see how he evolves. Well its very fuuny...

The familiar and MC combination form a good environment :3

I like the story and hope for More releases :3
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Shoji rated it
October 26, 2019
Status: Completed
Do keep in mind that I've already read the whole series in Japanese.

I must say, this series as a whole is excellent, though individual books may not feel like much because of the relatively slow pacing. It starts off a little slow and lacking in direction, but subtly introduces plot threads early on and slowly addresses them as it goes. Almost every character is important in some way, and they all have their own stakes and motivations in the big picture. I'd say that the core story starts really moving... more>> at around volume 5 or 6, but before then there are plenty of enjoyable mini-arcs and funny moments.

As for translation quality, the older translation (by Estelion's Secret Imouto) is absolutely horrible. It's basically barely edited MTL that becomes a poorly disguised translation of the manga adaptation a few chapters in

On the other hand, the newer translation (by Divine Dao Library) is wonderful. Very well written with consistent names and terminology throughout, and the writing is localized smoothly without losing any nuance. Note that they've re-translated the first few chapters that Estelion's Secret Imouto did, so if you're starting off, go to the second-to-last page of the chapter list.

Edit (6/7/2020) : The translation by Divine Dao Library, which is up to chapter 82 as of this edit, has dropped in quality slightly after about chapter 40. There are also some infrequent commentary by the editor and proofreader (none from the translator so far) that can come off as annoying. <<less
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jpmrblood rated it
June 2, 2019
Status: c12
This is a unique translating strategy. The translator brought the novel and the comic as one reading content. It made the story cohesive.

I just need to get used to switch between reading comic bubble and reading the novel. Just getting used with reading from right to left in comic mode. Then, read left to right in novel.

A new experience for reading habit.

I give kudos to the translator's effort. The story is nice. The language is good.
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AndyDarren rated it
March 11, 2019
Status: c5

Even if you can get past the not so great translation quality, the story itself isn't all that great.

First of all, literally every "chant" he uses is "Hoi hoi hoi no hoi *spell name*". Wtf is that?! That s**t is so freaking annoying to read! It's like he has eighth grade syndrome and a mental illness at the same time!

Next is a point that was already brought up and it's that the litrpg elements are just a defect in the plot, not only does it annoyingly quantise everything but it... more>> also makes it so that all the power the MC could've had from all his years of research is severly limited because of the s*upid titles. Now he only amounts to a really good magician.

Lastly is what happened just before I stopped reading. So the MC want's to help the villagers whose well has dried up. You would think than someone who's been doing research for 5k years would come up with a clever idea like using earth and water magic to locate and create a new natural well right? Well you'd be wrong, because for some cocaphony reason, water magic can't be used without being near a water source?! Yet for some other even more cocaphony reason, ICE MAGIC CAN BE USED NO PROBLEM! The MC then proceeds to launch a giant ice chunk into the old well, chop it up using sword magic, and melt it using fire magic, lather rinse and repeat until the well is full and then problem solved UNTIL THE WELL GOES DRY AGAIN AND HE HAS TO REPEAT THE PROCESS! 'Clever Protagonist' my ass!

You know I wanted to give this novel a 3 star out of fairness since I've only read up to chapter 5 but the more I think on it the more I feel like it deserves a lower rating especially after the manga got my hopes up for nothing. <<less
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2Girls1Cupcake rated it
November 2, 2018
Status: c7
The premise of this novel is great, a young man with low potential in magic becomes an immortal by chance, spends 5000 years learning magic and researching, after which he comes back out into the world that hasn't advanced but rather the opposite.

It's an awesome premise for the template of an op sage-like MC without any common sense and who has trouble dealing with other people, but rather than this it's just turned into a giant joke, he's basically useless because of the litRPG elements where he has horrible titles... more>> that lower his abilities and his personality is 2D at best.

The litRPG elements are horrible in themselves, they are there just as filler without any real depth, the editing of the translation is bad and the manga images thrown in is annoying as hell.

I expected better. <<less
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Xemul rated it
July 7, 2020
Status: Overall
It is an Adventure story in a Fantasy World. The story is told from the perspective of a Main Character *Asley* - a logical, analytical person, who after Millenia of Hikikomori lifestyle devoted to scrutinizing study of Magical Arts decides to leave his comfort zone and go out to see the World. Of course, not on the own accord but rather under nagging and trolling suggestion of his familiar doggo Pochi. As a person Asley is a very relatable character, as many issues he faces are very commonplace in our... more>> daily lives. However, in order to save the readers from the depressing prospect of self-reflection and endless reports on his analysis, the Author has paired him with hell of a Troll Familiar, who always deescalates and neutralizes boring situations with her out-of-place comments. And now, together they are going to face the REAL WORLD and all variety of its ridiculous, obnoxious and life threatening events in order for us to see whether a Nerd and his dog companion could come out of it alive.


The distinctive traits of this story IMHO are:

- Although MC is somewhat OP in certain perspectives, the Author presents this in very balanced manner and had made an extra effort to pack a set of drawbacks, which Asley is attempting to overcome.

- The storytelling is quite well tuned, pace of events are not overwhelming, the progress of the characters is rationally conceivable and there are very little dull moments.

- Characters are very well compiled but are all described from the perspective of MC, so... the evaluation of them is based on same standards. Nonetheless, there are very little plain characters who fulfil the roles of place fillers. Most of them are interactive and have certain role in the Grand Scheme...

- Grand Scheme.
There is one, but it is kept quite vague and the progress is not so linear. Throughout the story you will keep gathering fragments, which you would then have to put together to solve the puzzle.... and most of the time fail to do so correctly. (Isn't that fun?!)

- Romance.
No, the story is not reduced to another harem comic. Many Thanks to MC being completely Noob in this aspect and continuous pestering of one certain doggo. Overall, the romantic elements are present and kept... rather on the scarce side of the balance.

- Adventure.
Since we are talking about a Hikikomori Scientist, he is by no means a nomad that travels all over the world. No, he actually tries to stick to one place and do as much as he can until the next turn of event forces him out to meet new scary things. And believe me, there a lot of them. Although this element is not extremely vivid, the adventures that do happen are rather refreshing and medium to high quality of content. There will be more than enough challenges for Asley to overcome... leaving the audience to guess how the heck is he not dead yet?!

- Comedy.
Yes, this is one of the most prominent highlights of the story. The sense of humor, although being Japanese, is very well timed and integrated to the core of the story. Ridiculous moments not rare but always conforming to rationale. And as I mentioned, there is a lot of trolling... tones of trolling... Hell, reading the interactions between Asley and doggo can be called a standalone reason to checking this novel. The sense of humor and the reaction of its victims cannot be called anything but veeery relaxing.

- Guidebook.
All in all, if you seek some useful value in this novel - it will be its presentation of Communication Skills or lack thereof. The story of MC is a guidebook of how you should and should not do things. With a colorful depiction of the consequences, it teaches you enough about what you should not do and how exactly whatever you intend to do should not be done. Still, there is an exception: none has figured how to deal with Women, so we cannot blame Author in not presenting anything on this topic.

Anyhow, this is my review for now... <<less
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Japan112 rated it
April 16, 2020
Status: c66
Excellent Comedy, Good Strory Flow, More Dialogue than Monologue Of MC, Variety of Character & their Varied Personalities.

Overall MUST READ.
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maisonaustyn rated it
October 22, 2019
Status: c16
The story so far is fine but not much has happened or seems to be happening. The focus seems to be more on character interactions and minor world building than anything so far. At least from what has been translated. The characters are actually well done imo but the goal and direction of the series seems to be all over the place. Nearly to the point of some chapters being only SoL content without any plot/story relevance.

The translation isn't as bad as the other reviews make it out to be... more>> but still not amazing. The translation seems to be moving quite fast which is most likely the cause of its flaws. Seems the translator is rushing to catch up to the managa. (The manga is a decently ahead of this translation atm) <<less
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The_Follower rated it
September 27, 2020
Status: c114
Overall I really want to like it because it has a lot of good characters and an actual plot, but between the super hazy power levels and the changes to the plot over time I don't feel comfortable giving it even a 4/5, so I had to settle on 3/5.

The issue with power levels is that the author keeps pulling them from nowhere. We're repeatedly told in fights that the current top tier guys move so fast that the lower ranked guy can't even see them move unless they're completely... more>> concentrating, yet we're to believe that a handful of lower ranked guys can take them on? Same thing with monsters/humans being pulled from nowhere after it being established that people at certain power levels are rare, and then the main character happens to meet a ton of people on that level coming after him randomly or gets into fights at that level. Perhaps it was me just not really understanding the explanations, but the explanations of the magic itself are also questionable, being incredibly vague in a lot of important parts to understanding why certain things (like magecraft) are even important or useful.

All that would've been fine if the series had maintained its status as more of an adventure novel with him slowly advancing and focusing more on taking a deeper look at Asley's mentality, but it quickly becomes generic with the setting of him being a 5000-year old magic maniac quickly becoming irrelevant and him transitioning into the average dense harem main character. Talented mages of the current era are better than him at a lot of magic despite magecraft being almost gone in this era, and so his 5000 years feel pretty much wasted in terms of his actual abilities.

All that being said, the gags are genuinely good and Pochi is a great doggo with her banter with Asley, so I'd still recommend it if you like fun character interactions. <<less
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sadduckss rated it
February 6, 2021
Status: c50
This novel is undoubtedly overrated. The story is mediocre, and 3.0 star is the best grade I could possibly give it.

The character development is shallow throughout the novel. The MC fails to mature over the 5000 years of living and has no goal in mind, ultimately creating a boring plot with few serious conflicts. The novel evokes humor at times, however, for the most part, it remains quite balnd to readers.

It gets on my nerve how the MC keeps on reciting every spell with "Rise, A-rise, A-rise!" like he has... more>> eight grade syndrome, and it confuses me on why the MC continues to act like an idiot and fails to learn from his mistakes. The author should have fleshed out more emotional aspects and touch upon his lack of "humanity".

The character relationships are also undeveloped, and there are times when too many time skips make the novel slightly confusing.

TL;DR -->If you can stand someone reading about someone with an eighth-grade syndrome and don't mind wasting time on shallow character development, go for it. The humor definitely makes it funny. <<less
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