Estimated minutes: 10 min
Designer: Tomoaki Hamanaka
A slender triangular pyramid with a sharply elongated apex, offering strong structural stability. On its own, it is well suited for creating horn-like forms. By combining multiple units, it can be extended into solid structures such as cubes and square pyramids, making it a highly versatile structural element.
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Composite Square Pyramid
A square pyramid with a sharply pointed apex. It can be constructed by combining four triangular pyramid units using a twisting fold. A frame-like structure forms inside the shape, giving it high structural strength.

Nested Cube
A structure in which a cube is placed at the center of a recessed rectangular prism. A composite component created by combining a banded cube with a basic cube.

Deer Bust
A three-dimensional deer bust made from a single square sheet. The volume of the fur is expressed by densely folding the paper into complex layers using a technique called Miura-ori.

Cow Skull
A three-dimensional cow skull with the horn and eye colors altered through an inside-out design.

Hannya Mask
A three-dimensional Hannya mask constructed by combining polygon components. The eyes are expressed with an inside-out structure.

Inverted Cube
A structure created by turning the internal structure of the basic cube outward. It allows for decorative expressions in which triangular prisms surround the cube.

Basic Cube
The fundamental cube form. A basic structure for understanding the relationship between faces and corners.