square sun; approx. 9 sq. cm
Traditional Japanese unit of area: one square sun (1 sun ≈ 3.03 cm). Rare in modern everyday use; mainly encountered in historical or technical contexts.
See also: 寸
Figurative expression for the mind or heart, often used in literary or formal contexts. The image is of a small space (one square sun) that contains one's thoughts and feelings.
The face of this seal is about one square sun.
Without the slightest disturbance of mind, he answered calmly.
He tried to persuade them with all his heart.
heart; soul
Compound of 方 (square) and 寸 (sun, a traditional unit of length). The figurative sense derives from the idea of a small square space representing the mind.