種

The word "tane" primarily refers to a biological seed, but it extends metaphorically to describe the origin of a situation or a hidden mechanism.

When used to mean "cause" or "origin," it often carries a negative connotation. It is frequently paired with words like "conflict" (争い) or "anxiety" (不安) to describe a small trigger that eventually grows into a larger, problematic issue, mirroring how a tiny seed grows into a large plant.

In the context of magic or illusions, "tane" refers to the secret mechanism or the "trick" behind the performance. The phrase "tane o akasu" (to reveal the trick) is a standard expression used when a magician explains how a feat was achieved. Unlike a general secret (himitsu), "tane" specifically implies a structural or technical method used to deceive the eye.