SUKUYO / LUNAR MANSIONS
Explore your lunar mansion relationship.
Enter two birth dates to explore the relationship labels in a stated 27-mansion method. Only enter another person's birth information with their permission.
Your relationship summary will appear here.
How this method works
The entered Gregorian date is converted to a Chinese lunar month and day, then matched to a 27-mansion table that excludes Niu (牛). A leap month uses the same starting point as the regular month with the same number. The directional labels are calculated separately from each mansion toward the other.
For the distance categories used here, the shorter interval on the 27-mansion cycle is classified as near (1–4), middle (5–8), or far (10–13). Ming and Ye–Tai have no distance category. These labels are this site’s stated convention and are not presented as terms from the original scripture.
The daily mansion is calculated from the Beijing calendar date with the same lunar table; it is not an observed Moon longitude or a continuously rotating 28-mansion day cycle. These symbolic labels cannot establish either person's private thoughts or guarantee a relationship outcome.
Further reading: Sukuyo scripture, CBETA (Chinese); 27-mansion month/day table (Japanese); relationship calculation reference (Japanese). The site’s full method and limited cross-checks are described on the Chinese methodology page.