Jupiter rules houses 3 and 6 for Libra rising — functional malefic. The rules behind that verdict, dasha themes and how it compares with the other planets.
✦ Generate My Free Birth ChartFor Libra rising, Jupiter comes out net-challenging. It rules Sagittarius (the 3rd house) and Pisces (the 6th house), so its Mahadasha (16 years) concentrates on effort, courage and siblings and debts, disease and rivals.
Each rule below is applied in turn; the verdict is the sum. Positive numbers support the planet, negative ones weigh against it.
| Rule applied | Weight |
|---|---|
| Sagittarius is the 3rd house (Trishadaya / upachaya); Sagittarius is Jupiter's moolatrikona sign, so it counts 1.5× | -1.5 |
| Pisces is the 6th house (Dusthana / trishadaya) | -2.0 |
| The lagna lord Venus is neutral toward Jupiter | 0.0 |
| Net score → Functional Malefic | -3.50 |
Sagittarius — house 3 (Trishadaya / upachaya). The 3rd house governs effort, courage and siblings. Whatever Jupiter promises or withholds in a chart tends to be delivered through these matters. It is also the planet's moolatrikona sign.
Pisces — house 6 (Dusthana / trishadaya). The 6th house governs debts, disease and rivals. Whatever Jupiter promises or withholds in a chart tends to be delivered through these matters.
| Planet | Houses ruled | Functional reading |
|---|---|---|
| Sun | 11 | Functional Malefic (badhaka) |
| Moon | 10 | Mildly Malefic |
| Mars | 2 & 7 | Neutral / Mixed (maraka) |
| Mercury | 9 & 12 | Mildly Benefic |
| Jupiter | 3 & 6 | Functional Malefic |
| Venus | 1 & 8 | Lagna Lord — Benefic |
| Saturn | 4 & 5 | Yogakaraka |
Rahu and Ketu own no signs, so they have no lordship to classify; they act through the sign lord of the sign they occupy and the planets they join (see Rahu & Ketu in KP).
In the Vimshottari system Jupiter's Mahadasha lasts 16 years out of the 120-year cycle. For Libra rising it activates the 3rd house (effort, courage and siblings) and the 6th house (debts, disease and rivals). Expect those areas to need extra care and effort; the sub-lords of the period and the transits at the time decide which way it actually goes. See Jupiter Mahadasha for the period itself.
Libra is a movable sign, so its Badhaka (obstruction) house is the 11th, whose sign is Leo and whose lord is Sun. Jupiter is not the Badhaka lord. The Maraka lords for Libra rising are Mars (2nd) and Mars (7th); Jupiter is not one of them.
In KP astrology, ruling a house by sign is only the weakest of the four levels a planet can signify through (the others are occupying it and the star-lord links). A functional malefic reading by lordship is useful context, but the sub-lord chain in the actual chart is what decides outcomes. See Significators in KP and Sub-Lord Theory.