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Nine Star Ki · Star 9 of 9

九紫火星, Nine Purple Fire: the star of the south

九紫火星, Nine Purple Fire, is the last of the nine stars: purple, Fire, at the top of the Lo Shu square in the south palace, the place of the 離 (Ri) trigram, fire and brightness. Japanese practitioners read a person whose year star is 九紫 as sensitive and perceptive, with an eye for beauty and a gift for seeing through things.

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The Lo Shu square drawn South on top, the numbers 4 9 2, 3 5 7, 8 1 6 each with its count of dots; the cell of 9, at the top middle, is outlined and tinted, and labelled South, 離宮. S N E W 4 9 2 3 5 7 8 1 6 九紫 Nine Purple Fire South · 離宮 Trigram ☲ Lo Shu · South on top
Nine Purple Fire in its home palace: the top middle cell, which is the south, since Japanese boards put South on top. The nine open dots mark the largest odd number.

Facts

Number
9 of 9
Japanese name
九紫火星 (きゅうしかせい, kyūshi kasei)
Literal name
Nine Purple Fire Star; compact label 9 Fire
Colour and phase
Purple (紫); Fire (火)
Trigram
離 ☲ Ri (Chinese Lí), fire
Home palace
離宮, the south: the top middle of the square
Branch of the palace
午
Chinese forms
九紫火星; in Chinese feng shui also 九紫右弼星
House on the boards
The ninth of nine: the bright phase
Recent years of this star
1982, 1991, 2000, 2009, 2018 (each from 立春)
Opposite palace
坎宮, the north, home of 一白
Phase relations
Generated by Wood (3, 4); generates Earth (2, 5, 8)

Meaning

Nine Purple Fire stands at the top of the square, in the south, the place of the 離 trigram, fire and the sun. The Shuogua makes it the trigram of brightness: "相見乎離", in 離 all things see one another, and it adds that the sage faces south when he gives audience, turning toward the light to govern. Its season is summer, and its family role is the middle daughter.

Japanese practitioners read a person whose year star is 九紫 as sensitive and perceptive, with an aesthetic sense and a gift for seeing through things, and say the type does best in a specialised field. Our own text calls it fire at noon: bright, perceptive and passionate, an illuminator who sees clearly and shows others, drawn to beauty and recognition, with impulse, exposure and volatility as the shadow side. The Kushi line calls the number 9 Fire and gives it summer, noon and the themes of activity and brightness.

North and south face each other across the square: 九紫 at the top and 一白 at the foot, fire and water, the two stars with no other star of their phase.

On the boards

九紫 is the star of the solar years 1982, 1991, 2000, 2009 and 2018, each from 立春. In a 九紫 year the first solar month has the star 五黄, so a 九紫 person born in the 未 month, from 小暑 in early July to 立秋 in early August, has 九紫 as their month star too, and the inclination falls on the centre.

With any other month star in the centre, a 九紫 year star lands in 巽宮 (month star 1), 震宮 (2), 坤宮 (3), 坎宮 (4), 離宮 (5), 艮宮 (6), 兌宮 (7) or 乾宮 (8).

The south palace is the ninth and last house of the nine-step rhythm, which the tradition reads as the bright phase, a time of visibility, clarity and partings. The tradition counts a direction auspicious for a 九紫 person where 三碧 or 四緑 stands, the Wood that generates Fire (生気), or where 二黒 or 八白 stands, the Earth that Fire generates (退気); there is no other Fire star, and 五黄 is never counted. We show these as the tradition's readings and advise no journey.

九紫 also marks the turn of the day chart. From the 甲子 day nearest the summer solstice, the Japanese day chart counts down from 九紫, the descending run called 陰遁, until the 甲子 nearest the winter solstice starts the count up again from 一白.

The trigram's classical correspondences

The Shuogua's lists for 離:

  • Family member: the middle daughter (中女).
  • Part of the body: the eyes (離為目).
  • Image: fire (離為火); Legge's translation adds the sun, lightning, a coat of mail and the tortoise among its images.
  • Polarity of the trigram: yin, as one of the three daughters.

These are the trigram's symbols in a classical text, nothing more. They are not statements about anyone's body, and no source we found gives the star itself a yin or yang.

Names

The Japanese name reads kyūshi kasei: 九 nine, 紫 purple, 火 fire, 星 star. The Traditional Chinese form is the same; Chinese feng shui also calls it 九紫右弼星, after 右弼, the right-hand helper that later lists add to the seven stars of the Northern Dipper. The trigram is read Ri in Japanese and Lí in Chinese; Zheng Xuan's commentary ends the spirit Taiyi's round of the palaces at 離. Its doubled form is hexagram 30 of the I Ching.

Correspondences

Each item with how it stands: “sourced” is in the work cited, “our construction” is EsoTerrier’s own, and “disputed” means the sources disagree.

Season in the Later Heaven circuit
Summer: the south, the trigram of brightness, where the Shuogua says all things see one another sourced
The Kushi line's season and hour
Summer and noon, under the name 9 Fire; a modern Western reading sourced
Character taught in Japan
Sensitive, with an aesthetic sense; at its best in a specialised field sourced
Place in the day chart
The star the descending run (陰遁) starts from after the summer solstice sourced
Chinese Dipper name
右弼, the right-hand helper of the Northern Dipper; a name only here sourced
Our one-line image
Fire at noon our construction
Our reading of its house
The bright phase, read as a time of visibility, clarity and partings our construction

How the schools read it

Japanese 気学
Sensitive and aesthetic, perceptive and quick to see through things; does best in a field of its own.
The Kushi line
"9 Fire": summer and noon, activity and brightness.
Chinese feng shui (Xuan Kong)
Names the number 九紫右弼星 and reads it for the sectors of a building over time; that reading is not a trait of people and is not shown here.
Eight Mansions feng shui
A Kua number of 9 is the 離 life trigram, from a formula that differs for men and women: a different number from the year star.
EsoTerrier
Fire at noon: bright, perceptive and passionate, an illuminator drawn to beauty and recognition, with impulse, exposure and volatility as the shadow side.

Claims about it

  • 九紫 is a yang star.

    unverified

    What the record shows: Our old engine said so. No Japanese source gives the star a polarity, and the Shuogua makes its trigram, 離, a yin one, as the middle daughter.

  • The Chinese flying-star reading of 九紫 describes the people born under it.

    disputed

    What the record shows: In Xuan Kong that reading belongs to the number in a sector of a building for a period. We show only the Chinese name.

  • Nine Purple Fire rules a part of the body.

    unverified

    What the record shows: The Shuogua gives the 離 trigram a part of the body as a symbol. We give it only in the trigram's block.

  • Nine Purple Fire is a star in the sky.

    false

    What the record shows: It is the number 9 of the Lo Shu with its colour and phase; "star" is a counting name.

Elsewhere on EsoTerrier

Sources

Primary texts (5)
  1. James Legge, trans., The Yî King (Sacred Books of the East, vol. XVI), Appendix V, the Shuo Kwa. Oxford: Clarendon Press, 1882. archive.org/details/sacredbooksofchi16conf
  2. 周易: the 繫辭 (Great Commentary) and the 說卦 (Treatise on the Trigrams). Chinese text, Wikisource. zh.wikisource.org/wiki/周易/說卦
  3. 園田真次郎 (Sonoda Shinjirō), 干支九星閏解説: 附・三合原理. Tokyo: 大正館, 1930. NDL Digital Collection, public domain. dl.ndl.go.jp/pid/1104437
  4. 蕭吉 (Xiao Ji), 五行大義, juan 4 and 5. Sui dynasty. Chinese text, Wikisource. zh.wikisource.org/wiki/五行大義/4
  5. 周易乾鑿度 (Qian zuo du), Han apocrypha, with the commentary of 鄭玄 (Zheng Xuan, 127 to 200). Siku quanshu text, Wikisource. zh.wikisource.org/wiki/周易乾鑿度_(四庫全書本)
Studies and other sources (12)
  1. "九星", Japanese Wikipedia (orientation only). ja.wikipedia.org/wiki/九星
  2. "九星気学", Japanese Wikipedia (orientation only). ja.wikipedia.org/wiki/九星気学
  3. koyomi8.com (こよみのページ), the day-chart tables and the notes on 陰遁 and 陽遁. Facts only. koyomi8.com/sub/9sei.html
  4. 9starki.com (the Kushi line, online since 1996): FAQ, toolbox and information pages. Facts only. 9starki.com/faq.htm
  5. stellica.jp, a guide to the inclination palace (2025). Facts only. stellica.jp/blog/kyusei-keishakyu-guide
  6. picora.net, pages on 同会 and the nine-year cycle (2025). Facts only. picora.net/column/kyusei/doukai
  7. nonbirito.jp, pages on the boards and the auspicious directions (2025). Facts only. nonbirito.jp/kakuhouiban-kippoui
  8. shin-yu.net, the character and direction calculators, in Japanese and English (2026). Facts only. shin-yu.net/kyuseikigaku/seikaku
  9. Kua number pages: yourchineseastrology.com, fengshui-expert.fr and fengshui-village.com (2025). Facts only. yourchineseastrology.com/feng-shui/direction
  10. 星林學苑, "玄空九星" (2024), on the nine stars of Xuan Kong feng shui. Facts only. 108s.tw/article/info/291
  11. David Snieckus, after Roel Hill, "Nine Star Ki" (2007), a table of the Kushi line. Facts only. davidsnieckus.com/nine-star-ki
  12. Oggi.jp (Shogakukan), "九星気学とは? 本命星の性格と運勢" (2025). Facts only. oggi.jp/6772474
Our own research (2)
  1. EsoTerrier, Nine Star Ki research and validation, 10 to 14 October 2026.
  2. EsoTerrier calculation engine, the Nine Star Ki service and its documentation.

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By EsoTerrier. Written with AI assistance from our research and checked against its sources; last revised 19 October 2026. How we write these pages.

First published ; last revised . Corrections: support@esoterrier.com.