Not built above ground, but hidden underground! Chiba’s “Library in the Earth” feels like walking into a secret cave
The lawn is the roof, and a crack in the ground is the entrance
Summary
- Library in the Earth is located in KURKKU FIELDS in Kisarazu, Chiba Prefecture. It was designed by architect Hiroshi Nakamura and NAP, and officially opened to the public in 2023.
- The roughly 113 m² library is hidden beneath grass and plants. You follow an entrance that looks like a crack in the earth, and only then do you see the bookshelves and reading areas unfolding around a droplet-shaped courtyard.
- The library holds more than 3,000 books, centered on nature and agricultural living, then branching out into poetry, philosophy, history, religion, science, and economics. At the moment, entry requires joining the KURKKU FIELDS Membership and reserving in advance.
Not being able to find the entrance at first glance may be this library’s most charming feature.
Hidden within KURKKU FIELDS in Kisarazu, Chiba, the “Library in the Earth” has no eye-catching facade or grand entrance visible from afar. From the lawn, it looks more like a natural fissure in the ground; the library itself is quietly hidden beneath the plants and soil.
Designed by architect Hiroshi Nakamura and NAP, this space wasn’t created to place a beautiful building on a farm. Instead, it asks: If the land is the main character, can the architecture disappear?
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Rather than placing a library in nature, it disappears right into the earth
images from/KURKKU FIELDS
The site of the Library in the Earth was originally a valley filled in with leftover construction soil. The design team wanted to restore the valley and vegetation leading to “Mother Pond,” so rather than building on the surface, they buried the library beneath the slope, allowing plants, soil, and microorganisms to continue growing on its roof.
As you make your way down the narrow entrance, the space gradually opens up. A teardrop-shaped atrium sits at the center, while bookshelves follow the curved walls to form a ring-like “corridor of books.” The floors, walls, and ceilings all have finishes that resemble the texture of soil, making it difficult to tell where the building begins and the earth ends.
Even the edges of the roof are covered in grass, with the plants naturally cascading downward. From the outside, it doesn’t look like a work of architecture placed in nature. Instead, it feels like the earth itself has split open to create a cave where you can slip inside and read.
Underground, yet always in view of sunlight and sky
images from/KURKKU FIELDS
Once you’re underground, the space isn’t as dark as you might imagine.
An operable skylight at the center lets sunlight stream directly indoors, while air enters through the atrium and exits from above to create natural ventilation. Look up and your view is framed by a small patch of sky, making clouds, sunlight, and shifts in the weather part of the reading space.
The lighting between the bookshelves is also shaped like a “book,” and pulling out the fixture lets you adjust the brightness. Rather than the even, bright lighting of a traditional library, this space deliberately leaves pockets of shadow, giving each reading nook the feeling of hiding out in a secret hideaway.
The library also has reading seats, small rooms, and a Reading Hall for storytelling activities. It’s not a large library; its limited space and seating make it feel more like a quiet “book repository” where you can linger, rather than a large public library where you quickly find a book, check it out, and leave.
More than 3,000 books are hidden underground with the land
images from/KURKKU FIELDS
The books here aren’t randomly crammed onto the shelves, either. The Library in the Earth’s collection centers on nature and agricultural life, then extends to poetry, philosophy, history, religion, science, and economics, with the hope of creating new connections between different subjects.
The library held around 3,000 books when it opened, and its collection has continued to grow. KURKKU FIELDS describes it as a place “to read underground and accumulate knowledge”: People read beneath the soil as the plants overhead continue to grow, then step back onto the actual ground when they leave the library.
The Library in the Earth is currently generally open from 12:00 to 17:00, with separate hours for guests staying at KURKKU FIELDS. To enter, you need to join KURKKU FIELDS Membership and make a reservation. If you’re planning a special trip, it’s best to check the latest reservation availability through the official channels first.
Perhaps that’s what makes the Library in the Earth so special: It doesn’t try to impress visitors with massive walls of books. Instead, it makes the architecture smaller and hides it away. What is enlarged instead is a book, a beam of sunlight, and the quiet time spent reading beneath the earth.
Join Popbee Circle and subscribe to the Popbee newsletter for the latest updates and early access to exclusive perks and discounts! Beyond this article, here are a few recent stories worth checking out:
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