January
February
March
April
May
June
July
August
September
October
November
December
function calculateNineStar() {
var d = parseInt(document.getElementById('kiDay').value);
var m = parseInt(document.getElementById('kiMonth').value);
var y = parseInt(document.getElementById('kiYear').value);
var resultDiv = document.getElementById('kiResult');
if (!d || !m || !y || d 31 || y < 1800) {
alert("Please enter a valid birth date.");
return;
}
// Adjustment for Japanese Solar Year (Starts Feb 4th)
var calcYear = y;
if (m < 2 || (m == 2 && d 0) {
sum += tempYear % 10;
tempYear = Math.floor(tempYear / 10);
}
// Reduce to single digit
while (sum > 9) {
sum = Math.floor(sum / 10) + (sum % 10);
}
// Calculate Principal Star (Subtract from 11)
var principalStar = 11 – sum;
if (principalStar > 9) principalStar -= 9;
var starInfo = {
1: { title: "1 Water Star", element: "Element: Water (Kan)", color: "#3498db", desc: "You are flexible, adaptable, and intuitive. Like water, you can navigate obstacles easily but may struggle with emotional boundaries. You are a deep thinker and often possess great wisdom." },
2: { title: "2 Soil Star", element: "Element: Earth (Kun)", color: "#964B00", desc: "You are nurturing, supportive, and dependable. You are the 'mother' energy of the stars, focusing on service and community. You prefer stability and may take time to make decisions." },
3: { title: "3 Tree Star", element: "Element: Wood (Chen)", color: "#27ae60", desc: "You are energetic, impulsive, and pioneering. Like a sprout breaking through soil, you have immense drive and a desire for growth. You are expressive and enjoy new beginnings." },
4: { title: "4 Tree Star", element: "Element: Wood (Sun)", color: "#1e8449", desc: "You are practical, harmonious, and persistent. Unlike the impulsive 3 Tree, you represent the mature tree—strong and flexible. You are excellent at networking and building long-term relationships." },
5: { title: "5 Soil Star", element: "Element: Earth (Center)", color: "#f1c40f", desc: "You are the center of the Lo Shu square. You are powerful, transformative, and often face significant life shifts. You possess natural leadership qualities and can influence those around you deeply." },
6: { title: "6 Metal Star", element: "Element: Metal (Chyan)", color: "#7f8c8d", desc: "You are disciplined, authoritative, and ethical. You have high standards for yourself and others. You value structure and often find yourself in positions of responsibility." },
7: { title: "7 Metal Star", element: "Element: Metal (Dyan)", color: "#e74c3c", desc: "You are charismatic, sensitive, and enjoy the finer things in life. While you value metal's strength, you represent the 'joyful' side of metal. You are communicative and often gifted in arts or speech." },
8: { title: "8 Soil Star", element: "Element: Earth (Ken)", color: "#a67c52", desc: "You are strong-willed, reserved, and incredibly persistent. You are like a mountain—immovable and steady. You often achieve success later in life through sheer determination." },
9: { title: "9 Fire Star", element: "Element: Fire (Li)", color: "#8e44ad", desc: "You are brilliant, passionate, and visible. Like fire, you illuminate everything around you. You are highly perceptive and emotional, often seeking recognition for your creative talents." }
};
var data = starInfo[principalStar];
document.getElementById('starTitle').innerText = "Principal Star: " + data.title;
document.getElementById('starElement').innerText = data.element;
document.getElementById('starElement').style.color = data.color;
document.getElementById('starDesc').innerText = data.desc;
resultDiv.style.borderLeftColor = data.color;
resultDiv.style.display = "block";
}
Understanding 9 Star Ki Astrology
9 Star Ki is one of the oldest forms of astrology in the world, originating in ancient China and later refined in Japan. Unlike Western astrology which focuses on the positions of the planets against the zodiac, 9 Star Ki focuses on the flow of energy (Qi) and how it cycles through nine distinct stages, represented by numbers, elements, and the Bagua.
How the Calculation Works
Your Principal Star is determined by your year of birth. However, there is a critical rule: the 9 Star Ki year does not begin on January 1st. It follows the solar calendar, beginning on February 4th (Lichun). If you were born between January 1st and February 3rd, this calculator automatically attributes your energy to the previous calendar year.
The math involves summing the digits of your birth year until you reach a single digit (1-9), and then subtracting that from the number 11. This result defines your core personality and your "Adult" energy.
The Five Elements of 9 Star Ki
Each of the 9 stars belongs to one of the five elements, which dictates how you interact with others:
Water (1): Focused on flow, intuition, and the internal world.
Soil (2, 5, 8): Focused on stability, nurturing, and the physical ground.
Tree/Wood (3, 4): Focused on growth, vitality, and expansion.
Metal (6, 7): Focused on structure, refinement, and harvesting.
Fire (9): Focused on visibility, passion, and spiritual light.
Example Calculation
If a person was born on March 15, 1985:
The year is 1985 (after Feb 4, so we use 1985).
Sum the digits: 1 + 9 + 8 + 5 = 23.
Reduce to a single digit: 2 + 3 = 5.
Subtract from 11: 11 – 5 = 6.
Result: Principal Star 6 (Metal).
Why Use 9 Star Ki?
Practitioners use this system to understand relationship compatibility, career timing (the 9-year cycle), and personal development. By knowing your star, you can understand why you react to certain stresses in specific ways and identify which years are best for "planting seeds" versus "harvesting results."