Best Isekai Anime Where The MC Uses Modern Knowledge

They say knowledge is power and in isekai anime having the advantage of knowing more about science and modern topics is most definitely one of the highest perks of being a reincarnated main character who gets to keep their memories.

This cheat-like skill has created many situations where the culture of our modern world permeates that of the fantasy setting where these people are reincarnated or sent on a quest to stop the demon lords. This topic spotlights the best isekai anime where the protagonist uses modern knowledge, taking into consideration the ripple effects they create, the importance it has for the plot, and the overall quality of the shows.

8

The Eminence In Shadow

Unknowingly, Cid Establishes The Strongest Merchant Company In The World

With its unique satirical approach to the isekai genre, The Eminence in Shadow is also the finest example of a protagonist using his modern knowledge in a fantasy world. Much to Cid’s chagrin though, he didn’t have the vision to construct an empire using these skills, filling his pockets in the process.

But, the Seven Shadows, his faithful pseudo-harem members, founded the Mitsugoshi Company using all the crazy tales Cid told them using his knowledge from his previous life. This led to the creation of the biggest mercantile emporium in the Kingdom as well as some crazy and funny situations. But above all else, its artwork, incredible combat scenes, and great story flow make it serious enough to be one of the most popular isekai anime.

7

That Time I Got Reincarnated As A Slime

With His Superior Military Knowledge, Rimuru Manages His Kingdom Brilliantly

Rimuru is not only a powerful Demon Lord/Demon Slime, but he is also a master diplomat who uses his knowledge from the modern world to brilliantly maneuver his way out of the thorniest of political entanglements.

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On the other hand, his military knowledge gives him an extra edge when commanding his army when it is the only way to resolve a conflict. Needless to say, he is also powerful enough to wipe out an entire kingdom if he wants. Its deep worldbuilding and character development make this anime quite good, and worth watching for every fan of kingdom management stories.

6

Ascendance Of A Bookworm

Her Passion For Sharing Knowledge Knows No Bounds

In Ascendance of a Bookworm, Myne (formerly Urano Motosu) is an advantaged and smart girl with deep linguistic knowledge and an expert mathematician. Her passion for books and stories gives her impulse, and the knowledge from her past life as a librarian and college graduate allows her to skillfully maneuver through the most complex of scriptures, as well as the finer arts and accounting.

The power of her mind is the most valuable tool in this fantasy world where sword and sorcery are commonplace, and she makes use of them with extreme prejudice. While this story is low stakes and doesn’t have as much action as other isekai series, its endearing friendship moments and quirky characters put it above some of its peers.

5

Konosuba

Kazuma Is A Genius When Its All About Making Tons Of Money At Low Effort

As the main character of this story, Kazuma Satou leaves no room for improvement. Seriously, he is one of the lamest of them all, but that doesn’t make him any less smart and resourceful when he sets his mind to his favorite activity: lazing around. This series has some incredible moments, some endearing, and some outright whacky. Most of it involves some of Kazuma’s friends (or himself) doing something so terrible that they end up paying reparations to the kingdom.

When his party was severely suffering from economic loss due to the rampage of its most impulsive party members, Kazuma created a plan to earn absurd amounts of money without having to risk his neck adventuring. And so, using the knowledge from his past life, he created a series of products, allying himself with the demon Vanir to make ludicrous amounts of gold.

4

No Game No Life

These Siblings Use Their Strategic Knowledge Of Gaming To Thrive

Shiro and Sora are half-siblings who share a common goal: survive in a fantasy world where games are rough and the stakes are high. To do that, Sora uses his incredible eloquence and charisma, as well as his photographic memory, to outmaneuver most of his foes.

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On the other hand, his sister Shiro is a master at calculus, probability, prediction, and linguistics. She is a master chess player and speaks over twenty languages. Together, they make a formidable team armed with a vast reservoir of knowledge about advanced gaming and board game mechanics. This series has incredible visuals and a colorful art style that make it quite unique.

3

Mushoku Tensei: Jobless Reincarnation

Rudeus Uses His Modern World Knowledge To Create Better Spells, Among Other Things

In this story about reincarnation and letting go of insecurities, Rudeus Greyrat (formerly a NEET hikikomori) now tries to live a new life in a fantasy world. His knowledge of his life in Japan still serves a purpose, as he uses his versatile thinking to learn magic faster and better than others.

On the other hand, he is quite obsessive about certain things, even going so far as to create action figures of his favorite teacher: Roxy. Though this series is quite divisive, the overall quality of its production is undeniable.

2

How A Realist Hero Rebuilt The Kingdom

With His Deep Knowledge On Administration, This Guy Became The Monarch They Needed

In How A Realist Hero Rebuilt The Kingdom, Kazuya Souma is summoned to another world to be the king no less. Instead of a hero, they brought someone with modern-times knowledge and capable enough to lead a nation.

Then why pick up a random college student from Japan? According to the story, the Elfrieden Kingdom needed someone young enough to marry the princess, but smart enough not to become a tyrant. So they got just what they asked for: a smart, capable, dependable, and brilliant student with the airs of a company manager. It’s a great story that has been viciously underrated. Plus, it doesn’t involve ridiculous harem situations like in other isekai.

1

In Another World With My Smartphone

Having Access To Modern Tech In A Fantasy World Is A Great Advantage

In terms of storytelling quality and worldbuilding, In Another World With My Smartphone is subpar at best. But, it has some good aspects that make it fit into this ranking. The series’ main character is a goofy and aloof guy, who stubbornly (and thankfully) rejects those harem vibes the anime has.

But, that doesn’t make him any less overpowered, and like with any cheat-skill user, he wields the knowledge of his past life and his smartphone (yes, that’s right) to gain the upper hand in this fantasy world. He is also heavily inspired by Squall from Final Fantasy 8 in more than one way, and that’s cool!

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