Jathaka Porutham: Kerala's Ten-Porutham Marriage Matching
In Kerala, the horoscope comparison that precedes a wedding is called jathaka porutham or thirumana porutham. The astrologer — traditionally the family's Kaniyan or a trusted panicker — takes both janma nakshatras and works through the poruthams one at a time, then reads the result together with the couple's dashas and the year's gochara before advising a date.
This calculator performs the ten poruthams that Kerala shares with the other South Indian systems — Dina, Gana, Yoni, Rasi, Rasiyadhipathi, Vasya, Rajju, Vedha, Varna and Nadi — and shows the reasoning behind each one so the reading can be discussed with an astrologer rather than accepted blindly.
The Poruthams, One by One
Dina porutham counts from one nakshatra to the other and speaks to longevity and the ordinary rhythm of married life. Gana porutham classifies each nakshatra as Deva, Manushya or Rakshasa and judges whether two temperaments can share a household. Yoni porutham compares the animal symbols for physical and instinctive harmony, and Rasi porutham compares the Moon signs for emotional and domestic accord.
Rasiyadhipathi porutham examines the friendship between the lords of the two Moon signs. Vasya porutham asks whether one partner naturally holds a calming influence over the other. Rajju porutham — read with particular seriousness in Kerala — requires the two nakshatras to fall in different rajju groups, since the same group is associated with risk to the husband's longevity. Vedha porutham blocks specific obstructing pairs. Varna porutham reflects temperamental and spiritual alignment, and Nadi porutham is the heaviest check of all: the same nadi is linked to health and progeny concerns.
What Kerala Reading Adds
A Kerala thirumana porutham reading normally goes beyond these ten. Mahendra porutham and Sthree dheerga porutham — which look at the continuity of the lineage and the wife's long-term wellbeing — are commonly required, and this calculator does not compute them. The astrologer also examines dasa sandhi: whether the couple's current planetary periods support marriage in the intended year, and whether any dosha in either chart has a pariharam that should be performed before the muhurtam.
Because of that, treat this page as a first reading. It will tell you which poruthams agree and which are flagged, and it will show you exactly why — but the decision in a Kerala family is taken after a full reading of both janma patriyas, usually in the presence of both families.
Getting the Inputs Right
All ten rules operate on the janma nakshatra, so the nakshatra must be correct before anything else. A birth time recorded loosely — a rounded hour, or a memory of 'early morning' — can move the Moon into the neighbouring nakshatra and change the entire result. If the time on the horoscope is doubtful, have it rectified first; the dedicated birth-time rectification tool is linked below, and the full kundali matching gives the chart-based picture that porutham alone cannot.
Frequently Asked Questions
What is jathaka porutham?
Jathaka porutham is Kerala's pre-marriage horoscope matching. The bride's and groom's birth nakshatras are compared through a set of poruthams — Dina, Gana, Yoni, Rasi, Rasiyadhipathi, Vasya, Rajju, Vedha, Varna and Nadi — and the result is read together with the couple's dashas.
Does Kerala matching use ten poruthams?
Kerala shares the ten poruthams used across South India and commonly adds Mahendra porutham and Sthree dheerga porutham, which this calculator does not compute. A full thirumana porutham reading by an astrologer covers those as well.
How many poruthams should match?
Seven or more out of ten, with Rajju and Nadi clear, is generally treated as a favourable match. Fewer than five calls for a full chart reading before any decision, since the poruthams alone do not describe the whole marriage.
Is Rajju porutham really the most important?
It is the one Kerala families most often refuse to waive, because the same rajju group is traditionally associated with risk to the husband's longevity. Where Rajju fails, the usual course is a pariharam before the wedding muhurtam, decided by the family astrologer.
Can jathaka porutham be done without the birth time?
Yes for these ten poruthams, because they only need the nakshatra. Anything involving the lagna, the bhavas or the dashas does need an accurate birth time, so rectification is the safer first step when the recorded time is uncertain.