Phase Relationships in Sanmei-gaku
Phase relationship analysis reads how the stems and branches in a chart relate to one another, and how the birth chart meets the stems and branches arriving through time. Some relations combine and stabilise; others scatter, separate, or trigger change.
Contents
Phase relationships read distance and movement
A Sanmei-gaku chart has three pillars: year, month, and day. Each pillar contains a heavenly stem and an earthly branch. Phase analysis looks at the relationship between these stems and branches.
The earthly branches are not only animal signs. They are a twelvefold map of time, direction, and season. Opposite branches such as Rat and Horse, directional groups such as Tiger-Rabbit-Dragon, and paired branches such as Rat-Ox form the basis of phase relationships.
This is why phase analysis is not a simple good-or-bad judgment. It asks where the chart gathers, where it moves, where friction appears, and where change is likely to be activated.
Innate phase relationships inside the birth chart
Phase relationships that appear among the day, month, and year pillars of the birth chart are innate phase relationships. FATE DECODER shows the three main connections: day with month, month with year, and day with year.
The day pillar is the axis of the self. The month pillar relates to social and practical life. The year pillar relates to parents, elders, ancestry, and early life. The meaning changes depending on which pair carries a combining or scattering relation.
For example, a combining relation between the day and month pillars may show that the self and practical activity connect easily. A scattering relation may show that adjustment, movement, or change becomes a recurring theme.
The basic frame: combining and scattering
The large frame of phase analysis is combining and scattering. Combining relations attract, gather, and move in the same direction. Harmony, half-meeting, grand half-meeting, triple union, directional trio, and Ritsu-in are read as relations where energy tends to gather.
Scattering relations collide, loosen, separate, or send energy outward. Clash, Natchin, Heaven-Earth Clash, penalty, harm, and break are read as relations where a stable pattern is disturbed or reorganised.
Combining is not always good, and scattering is not always bad. Too much combining can become attachment or immobility. Scattering can bring separation, but it can also create independence, change, and breakthrough.
| Type | Name | Combinations | Meaning |
|---|---|---|---|
| Combine | Harmony | Rat-Ox, Tiger-Boar, Rabbit-Dog, Dragon-Rooster, Snake-Monkey, Horse-Goat | Mutual attraction and bonding. Stability and fusion |
| Combine | Half-Meeting | Monkey-Rat-Dragon, Boar-Rabbit-Goat, Tiger-Horse-Dog, Snake-Rooster-Ox | Two of three branches align. Shared direction |
| Combine | Grand Half-Meeting | A half-meeting relation with the same heavenly stem | A stronger half-meeting. Large-scale alignment of direction |
| Combine | Triple Union | Monkey-Rat-Dragon (Water), Boar-Rabbit-Goat (Wood), Tiger-Horse-Dog (Fire), Snake-Rooster-Ox (Metal) | All three align — a complete elemental force. Powerful convergence |
| Combine | Directional Trio | Tiger-Rabbit-Dragon (East), Snake-Horse-Goat (South), Monkey-Rooster-Dog (West), Boar-Rat-Ox (North) | Three branches of the same compass direction. Environmental stability |
| Combine | Ritsu-in | The same stem-branch repeats | The same quality resonates. Repetition, emphasis, return to origin |
| Scatter | Clash | Rat-Horse, Ox-Goat, Tiger-Monkey, Rabbit-Rooster, Dragon-Dog, Snake-Boar | Diametrically opposed. Collision, change, separation energy |
| Scatter | Natchin | Same heavenly stem with clashing earthly branches | The surface quality is the same, but the roots move opposite. Switching and separation |
| Scatter | Heaven-Earth Clash | Heavenly stems restrict while earthly branches clash | Conflict on both heaven and earth layers. Major change and restructuring |
| Scatter | Penalty | Rat-Rabbit; Tiger-Snake-Monkey; Ox-Dog-Goat | Friction and tests. Conflict that drives growth |
| Scatter | Harm | Rat-Goat, Ox-Horse, Tiger-Snake, Rabbit-Dragon, Monkey-Boar, Rooster-Dog | Undermines harmony. Hidden obstacles |
| Scatter | Break | Rat-Rooster, Ox-Dragon, Tiger-Boar, Rabbit-Horse, Snake-Monkey, Goat-Dog | A relation where cohesion comes loose. Changes of plan or breakdowns |
Phase analysis reads both among the chart's three pillars (innate) and between the chart and luck cycles (acquired). More combining = stability tendency; more scattering = stronger change energy.
Ritsu-in, Natchin, and Heaven-Earth Clash
Ritsu-in appears when the same stem-branch repeats. It emphasises the same quality, like the same note resonating again. It can show repetition, return to origin, and a theme becoming very clear.
Natchin appears when the heavenly stem is the same but the earthly branches clash. The surface quality looks similar, while the root moves in the opposite direction. It is easier to understand Natchin as a scattering relation rather than a combining relation.
Heaven-Earth Clash is a strong scattering relation in which the heavenly stems conflict and the earthly branches clash. It often suggests a larger reorganisation of environment, role, relationship, or direction.
Acquired phase relationships in timing cycles
Phase analysis is also used between the birth chart and incoming timing cycles. Major luck cycles, annual cycles, monthly cycles, daily cycles, and hourly cycles all bring stems and branches that can form phase relationships with the birth chart.
When harmony or half-meeting arrives in an annual cycle, the year may more easily gather around a theme. When Natchin, clash, Heaven-Earth Clash, penalty, harm, or break arrives, relationships and circumstances may become more mobile and require adjustment.
FATE DECODER uses these acquired phase relationships in the annual, monthly, and daily timing views. Harmonious phases, opposing phases, and Tenchusatsu periods are shown with different tones.
Read movement, not simple luck
The most important point is not to reduce phase relationships to lucky and unlucky labels. Combining relations gather, but too much gathering can make movement difficult. Scattering relations loosen, but they can also release what has become stuck.
Innate phase relationships show a person's built-in movement pattern. Acquired phase relationships show when that pattern is stimulated by time. Reading both together helps organise past turning points and prepare for future timing.
FATE DECODER treats phase relationships as a tool for understanding how energy moves through time, not as a way to lock the future into a fixed outcome.
FAQ
What do phase relationships show?
They show how stems and branches in the birth chart relate to one another, and how incoming timing cycles interact with the birth chart. They describe gathering, scattering, friction, and movement.
Are combining relations always good?
No. Combining relations show gathering and stability, but they can also create attachment or immobility. Scattering relations can be difficult, but they can also bring change and breakthrough.
What is the difference between Ritsu-in and Natchin?
Ritsu-in repeats the same stem-branch, so the same quality resonates. Natchin has the same heavenly stem but clashing earthly branches, so the surface quality is similar while the root moves in the opposite direction.
Is Tenchusatsu the same as phase analysis?
No. Tenchusatsu reads void branches and periods when ordinary support becomes less stable. Phase analysis reads positional relationships between stems and branches. In timing readings, both are considered together.
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