九 星 気 学

The star your birth year
already chose for you

Nine Star Ki

Nine Star Ki places you in one of nine stars, based on the year you were born, and reads your nature, your strengths, and the direction that belongs to you. Which of the nine are you?

Free · about 60 seconds · no sign-up · no birth time needed
WHAT IS NINE STAR KI

What is Nine Star Ki九 つ の 星

Nine Star Ki is built on the Chinese "nine stars" and on Yin-Yang and the Five Elements, and was systematised in Japan. Depending on the year of your birth — measured from Risshun, around 4 February, not from 1 January — you belong to one of nine stars, from 1 White Water to 9 Purple Fire. That star is read as describing your innate temperament, the direction your energy runs, who you get on with, and the compass direction that belongs to you.

The birth star and the month star

Birth star (honmei-sei)

Set by your birth year. The foundation of your life — the character other people actually meet.

Month star (getsumei-sei)

Set by your birth month. Your interior, your childhood nature — the private self only close people see.

The Five Elements

Wood, Fire, Earth, Metal, Water. Each of the nine stars belongs to one of them, and that is what compatibility is calculated from.

The nine stars, and what each one is like

How to read your result (3 steps)

1
Start with your birth star — the you that other people meet, and the foundation of your life.
2
Then your month star — the interior you don't show, and the nature you had as a child.
3
Finally, use the elements and compatibility table to work out how to handle the people around you.
01 / Your birth date

Enter your birth date星 を 出 す

The Nine Star Ki year begins at Risshun, around 4 February. If you were born before that, your star is the previous year's — so enter the exact date. Nothing is stored or sent anywhere; the calculation runs in your browser. No birth time is needed.

Solar terms are approximated using average dates. If you were born within a day of a boundary, a professional may place you differently. For self-understanding and entertainment.

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02 / Your reading

Your star本 命 星

The large one is your birth star — your foundation. The month star below it is the interior version: the you that only family and close friends have met.

BIRTH STAR · 本命星
1 White Water

Who you are — five views

STRENGTHS
WATCH FOR
WHERE YOU BELONG

Your month star — the interior you

MONTH STAR · 月命星

You and the other eight

Compatibility, read from the element cycles. Generating = you feed each other. Same element = the same qi, and easy mutual understanding. Controlling = strong stimulus, and friction. A "controlling" relationship does not mean a bad person — it usually means the person you learn the most from.

Their starElementRelationshipHow to handle it
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FAQ

Common questionsQ & A

I was born in January and my star looks wrong.
The Nine Star Ki year begins at Risshun, around 4 February. If you were born between 1 January and roughly 3 February, you belong to the previous year's star. This trips up almost every casual calculator; we handle the boundary automatically.
Birth star or month star — which matters more?
The birth star is the foundation, and the character other people actually meet. The month star is your interior and your childhood nature. Read together, they give you a stereoscopic view: "this is how I look from outside, and this is what is actually going on in here."
What is the "home direction" for?
In Nine Star Ki the auspicious directions shift year by year and month by month as the stars rotate. What we show is your star's home position — the direction it natively sits in. Working out your current lucky directions requires a fuller calculation, which this simplified reading does not attempt.
My compatibility with someone is "controlling". Should I avoid them?
No. A controlling relationship means friction is likely — not that the person is bad for you. In practice these are often the people who show you what you cannot see yourself, and with a bit of distance and a clear division of roles they make formidable partners. Use divination to work out how to relate to someone, never to decide whether they deserve your time.
Are there other readings?
Yes — BaZi, Sanmei-gaku and Japanese Name Divination are all live. See the Tenmeia home page.
天命

One window, then another.

Nine Star Ki is one mirror. Tenmeia brings four Eastern systems together, each showing a different face of the same life.

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