What is Nine star Ki?
The horoscope combining the Nine stars of birth date, the the twelve earthly signs (Junishi / 十二支), and the five elements (Gogyou / 五行) is called nine-star ki (Kyusei ki gaku / 九星気学).
In Japan, Nine-star ki was also used as a compass in the “house divination” in the Edo period, and was widely disseminated in the Taisho period as “Ki gaku (fortune telling based on Chinese twelve year cycle)”.
It is classified as nine stars from the year of birth, and it is a popular divination from finding out fortunes, affinity and direction.
Nine stars are classified into the following nine from the birth year.
- 一白水星 (Ippaku-suisei / 1 Water) :
- 二黒土星 (Jikoku-dosei / 2 Earth )
- 三碧木星 (Sanpeki-mokusei / 3 Wood)
- 四緑木星 (Shiroku-mokusei / Wood)
- 五黄土星 (Goou-dosei / 5 Earth )
- 六白金星 (Roppaku-kinsei / 6 Metal) :
- 七赤金星 (Shichiseki-kinsei / 7 Metal)
- 八白土星 (Happaku-dosei / 8 Earth )
- 九紫火星 (Kyusei-kasei / 9 Fire)
Year of birth and Nine stars
The nine stars classified according to their birth year are listed below. *However, people born between New Year’s Day and February 3 (Setsubun) are considered to have been born the previous year. For example, a person born on January 20, 1976, is considered to be born in 1975, and considered as Shichiseki-kinsei(7 Metal) instead of Roppaku-kinsei (6 Metal).
一白水星(Ippaku-suisei / 1 Water)
1927, 1936, 1945, 1954, 1963, 1972, 1981, 1990, 1999, 2008, 2017
二黒土星 (Jikoku-dosei / 2 Earth)
1926, 1935, 1944, 1953, 1962, 1971, 1980, 1989, 1998, 2007, 2016
三碧木星 (Sanpeki-mokusei / 3 Wood)
1925, 1934, 1943, 1952, 1961, 1970, 1979, 1988, 1997, 2006, 2015
四緑木星 (Shiroku-mokusei / 4 Wood)
1924, 1933, 1942, 1951, 1960, 1969, 1978, 1987, 1996, 2005, 2014, 2023
五黄土星 (Goou-dosei / 5 Earth)
1923, 1932, 1941, 1950, 1959, 1968, 1977, 1986, 1995, 2004, 2013, 2022
六白金星 (Roppaku-kinsei / 6 Metal)
1922, 1931, 1940, 1949, 1958, 1967, 1976, 1985, 1994, 2003, 2012, 2021
七赤金星 (Shichiseki-kinsei / 7 Metal)
1921, 1930, 1939, 1948, 1957, 1966, 1975, 1984, 1993, 2002, 2011, 2020
八白土星 (Happaku-dosei / 8 Earth)
1920, 1929, 1938, 1947, 1956, 1965, 1974, 1983, 1992, 2001, 2010, 2019
九紫火星 (Kyusei-kasei / 9 Fire)
1919, 1928, 1937, 1946, 1955, 1964, 1973, 1982, 1991, 2000, 2009, 2018
Nine star Ki and the twelve earthly signs of Chinese zodiac
Here are the twelve earthly signs of Chinese zodiac assigned to nine stars. Please refer to this page for the details of the twelve earthly signs of Chinese zodiac.

- 一白水星 (Ippaku-suisei / 1 Water) : the year of the rat (子)
- 二黒土星 (Jikoku-dosei / 2 Earth) : the year of Sheep (未) and the year of Monkey (申)
- 三碧木星 (Sanpeki-mokusei / 3 Wood) : the year of the rabbit (卯)
- 四緑木星 (Shiroku-mokusei / 4 Wood) : the year of the dragon (辰) and the year of Snake (巳)
- 五黄土星 (Goou-dosei / 5 Earth) : Located in the center, there is no corresponding the twelve earthly signs .
- 六白金星 (Roppaku-kinsei / 6 Metal) : the year of dog (戌) and the year of boar (亥)
- 七赤金星 (Shichiseki-kinsei / 7 Metal): the year of rooster (酉)
- 八白土星 (Happaku-dosei / 8 Earth) : the year of cow and the year of tiger (寅)
- 九紫火星 (Kyusei-kasei / 9 Fire) : the year of the horse (午)
Nine stars (Kyusei / 九星) and the five elements (五行 / Gogyou)
Here are the five elements assigned to nine stars. The five elements are the philosophical thought of ancient China that is the basis of the Feng Shui idea, and it is the idea that everything is made up of “wood” “fire” “earth” “metal” “water”.
- 一白水星 (Ippaku-suisei / 1 Water) : Water
- 二黒土星 (Jikoku-dosei / 2 Earth) : Earth
- 三碧木星 (Sanpeki-mokusei / 3 Wood) : Wood
- 四緑木星 (Shiroku-mokusei / 4 Wood) : Wood
- 五黄土星 (Goou-dosei / 5 Earth) : Earth
- 六白金星 (Roppaku-kinsei / 6 Metal) : Metal
- 七赤金星 (Shichiseki-kinsei / 7 Metal): Metal
- 八白土星 (Happaku-dosei / 8 Earth) : Earth
- 九紫火星 (Kyusei-kasei / 9 Fire) : Fire
Nine stars (Kyusei / 九星) and eight trigrams (Hakke /八卦)
We will introduce you to the Hakke (eight basic statues of eki from ancient China) that can be assigned to nine stars. Please refer to Wikipedia for details.

- 一白水星 (Ippaku-suisei / 1 Water) : 坎(かん / kǎn)
- 二黒土星 (Jikoku-dosei / 2 Earth) : 坤(こん / kūn)
- 三碧木星 (Sanpeki-mokusei / 3 Wood) : 震(しん / zhèn)
- 四緑木星 (Shiroku-mokusei / 4 Wood) : 巽(そん / xùn)
- 五黄土星 (Goou-dosei / 5 Earth) : There is no assignment
- 六白金星 (Roppaku-kinsei / 6 Metal) : 乾(けん / qián)
- 七赤金星 (Shichiseki-kinsei / 7 Metal) : 兌(だ / duì)
- 八白土星 (Happaku-dosei / 8 Earth) : 艮(ごん / gèn)
- 九紫火星 (Kyusei-kasei / 9 Fire) : 離(り / lí)
Nine stars (Kyusei / 九星), direction, and colour
Here are directions and colours assigned to Nine Stars.

- 一白水星 (Ippaku-suisei / 1 Water) : North, White
- 二黒土星 (Jikoku-dosei / 2 Earth) : Southwest, Black
- 三碧木星 (Sanpeki-mokusei / 3 Wood) : East, Blue
- 四緑木星 (Shiroku-mokusei / 4 Wood) : Southeast, Green
- 五黄土星 (Goou-dosei / 5 Earth) : Central, Yellow
- 六白金星 (Roppaku-kinsei / 6 Metal) : Northwest, White
- 七赤金星 (Shichiseki-kinsei / 7 Metal) : West, Red
- 八白土星 (Happaku-dosei / 8 Earth) : Northeast, White
- 九紫火星 (Kyusei-kasei / 9 Fire) : South, Purple
Recommended Nine star gemstones
We will introduce you to the recommended gemstones for Nine stars.

- 一白水星 (Ippaku-suisei / 1 Water) : White Howlite
- 二黒土星 (Jikoku-dosei / 2 Earth) : Onyx
- 三碧木星 (Sanpeki-mokusei / 3 Wood) : Lapis Lazuli
- 四緑木星 (Shiroku-mokusei / 4 Wood) : Aventurine
- 五黄土星 (Goou-dosei / 5 Earth) : Citrine
- 六白金星 (Roppaku-kinsei / 6 Metal) : Moonstone
- 七赤金星 (Shichiseki-kinsei / 7 Metal) : Garnet
- 八白土星 (Happaku-dosei / 8 Earth : White Onyx
- 九紫火星 (Kyusei-kasei / 9 Fire) : Amethyst