Naiseikai Universe| The World of Introspection

内省の世界 - Naisei no Sekai | Official Light Novel Universe & Website

This Saga is where Pain mends and Molds the Heart <3


© All Rights Reserved | KarasuEJ / Alarkius Elvya Jay | https://www.alarkiusej.com/


For Fanbase or sub-fandoms, please refer back to our official subreddits or this website!

This universe’s original source of inspiration is from Mob Psycho 100


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Naiseikai Universe


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内省界 | The Naiseikai Universe

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The Quiet Crow and The Ninja! (Vol 1)

Upcoming Stories……

Nevertheless, You’re Still My Sister!

Can this Dullahan fall in Love? (Vol 1)

The Lonely Android and her 2GFs (Vol 1)

Alternate Realities

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内省界 | The Naiseikai Universe

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Alternate Reality Story

GyakuTen – Paradoxical Reincarnation


A saga of shadowed bloodlines and hidden truths, and self introspection...

This is a world where it will move your hearts.

📍 Setting: Neo Japan | Tokyo | Beyond | Set in the year 2100 +


All references here that relates to our book, worldbuilding, or quotes, are coded in:

A Different…..Earth

In the Naiseikai Universe, this is an Alternate Earth that differs from the Earth we know and love. But due to the significance of Yokai, Spirits, Humans and Angels, the size of Japan has increased because new landforms were made due to Earth Yokais inhabiting the continent.

And no, this is not the Neolithic age. This is the Future of Japan in the year 2,100.


Map of Neo-Japan.png


Overview of Neo-Japan's Techno-Geography

Neo-Japan is significantly larger than the Japan of our Earth due to spiritual and supernatural influences. Earth Yokais, through their connection to the land, have caused tectonic shifts and the formation of new landmasses over centuries. The continent now spans a greater area with additional islands, mountain ranges, and coastal regions that did not exist in our timeline.

While many familiar prefectures and cities still exist, their locations have been adjusted to accommodate the expanded geography. Some regions have been relocated entirely, and new spiritual zones have emerged that operate outside traditional prefecture boundaries.

Earth and Water Yokai work together to build and maintain this technology for the benefit of all citizens. Their magic is woven into every component of the floating system, making it a true fusion of supernatural power and advanced engineering.

Technology Production Duration

All of the technology that was built for Neo-Japan happened in the year of 1256 - 1275 AD.

Neo-Japan “Floats” on Water

Due to a lot of inhabitants of Earth and Water yokai, they have agreed to help all citizens alike by using their magic to turn the entirety of Japan’s landmass TO FLOAT steadily on the water! So that means there are no longer earthquakes (albeit minor ones (underwater volcanoes)) and tsunamis! The entirety Neo-Japan technically floats because under its giant mass, there are strong earth-like pillars that lift it above waters.

The stabilization is very smooth and it will not affect citizen life. All ocean internet cables run under this floating landmass. A very high neural network! If a tsunami hits the cliff-side walls of mass, the energy from that will be converted into clean renewable energy, which can power the whole of Neo-Japan for centuries if not more!

But what about the Ports and the Beaches?

They are still there! Because of the landmass that is raised significantly, the beaches are at a lower elevation due to the help of all the Earth Yokais magic. There’s a huge elevator-like slide that goes up and down along the walls of the cliffsides! This allows you to go down and enjoy the beach life. Shops are indented into the walls of the landmass which are tsunami-proof if it ever happens.

Daily Life