Japanese Numerology

This calculator works from one birth date, a gender setting and two optional number fields. The date produces four results: your eto, or zodiac sign, with its element and yin or yang polarity; a Kuji-kiri syllable; one of the Seven Lucky Gods; and a yakudoshi timeline. Gender changes only the yakudoshi ages. Of the number fields, one scores any string of digits by how it sounds and the other checks a shrine offering in yen. Nine Star Ki, rokuyō days and name stroke counts are not part of it.

The eto follows the solar year, which the calculator starts on 4 February, close to risshun, the traditional beginning of spring. Anyone born earlier is placed in the previous year's sign. The element comes from the year's last digit and the polarity from whether the year is odd or even. The Kuji-kiri and Lucky God results are this site's own mappings rather than established Japanese practice: the digits of day, month and year are added up, the total is reduced to one digit to choose among nine syllables, and the remainder after dividing by seven chooses a god.

Take 14 March 1990, with gender set to female. March is past the cut-off, so the year stays 1990: a yang Metal Horse, uma (午), matching the usual reading of 1990 as kanoe-uma. The digits 1, 4, 3, 1, 9, 9 and 0 total 27, which reduces to 9 and gives Zen (前), the last syllable. Twenty-seven leaves 6 after dividing by seven, which points to Hotei. Yakudoshi uses kazoe-doshi, the older count in which you are one at birth and a year older each New Year, so a woman born in 1990 counts as 37 during 2026, a hon-yaku year for women, and 38 during 2027, the tapering ato-yaku year. Entering 19900314 in the number field gives a neutral score.

Treat the eto as vocabulary rather than verdict. Horse, Metal and yang are images people in Japan use lightly, on New Year cards and shrine charms, and they can prompt you to ask which qualities you recognise in yourself. The syllable and the god suit a small reflective theme: Zen for attention and clarity, Hotei for contentment. A yakudoshi year is customarily marked with a shrine visit and some extra thought before big decisions. A low number score reflects a language-based custom, since 4 (shi) and 9 (ku) echo unwelcome words; it tells you how a number may be heard, not what will happen.

The method shows how Japanese calendar and number customs would label a date or a figure, but it cannot describe your character or foresee events.