Jia 甲 — Yang Wood

Jia is the first heavenly stem and the yang form of Wood — traditionally described as the standing tree. The day master is the heavenly stem of the day pillar, and it is the reference point from which the rest of the chart is read. Jia is yang Wood, conventionally described with the image of a large tree: upright, growing, slow to move.

Jia is the first heavenly stem and the yang form of Wood — traditionally described as the standing tree. The day master is a position in a system, not a personality reading: what it means in any particular chart depends on the whole chart, which is why the traditional texts never read it alone.

Traditional descriptions use tree imagery consistently — trunk, upward growth, and the property of being hard to bend once grown. The five-element association is Wood, the direction east, the season spring. It is grouped under Wood (木) in the five-element system.