Four Pillars (saju). The year, month, day and hour pillars come from a Korean
almanac that respects solar-term boundaries and converts lunar dates. Each name's spoken sound
is mapped to one of the five elements by where it's made in the mouth — the same rule Korean
naming practice applies to Hangul initials — and then compared with your day master and with
the element your chart has least of. Two schools disagree about lip and throat sounds, so we
show both and score the more conservative one.
Birth chart. Tropical positions of the Sun through Pluto from astronomy-engine,
weighted toward the Sun, Moon and rising sign. The rising sign needs a birth time and a city —
without them, it's left out rather than guessed. The name's Pythagorean numbers (expression,
soul urge, personality) are matched to the elements of your Sun and Moon.
Family. Each name against every person you add: the day-master relation,
whether the name brings the element their chart is missing, and how the two names sound together.
The limits, plainly. The Four Pillars use the local clock time you enter; for
births far from Korea, the hour pillar can land one slot off near a two-hour boundary. The
Latin-letter sound mapping is a heuristic, not a lineage school. All of it is a tradition read
for fun — it says nothing about anyone's future, and the ranking blends it fifty-fifty with the
practical checks below.