Jupiter is considered to be one of the most benevolent planets in Vedic astrology. It represents knowledge, wisdom, prosperity, and growth. When it is placed in the fourth house of the Pisces lagna, which happens to be an enemy sign placement, it can have some significant effects on the native's life.
To begin with, Jupiter becomes a maraka planet for Pisces lagna since it lords over houses 1 and 10. This means that if it is badly afflicted or placed in unfavorable houses, it could lead to negative consequences related to health and career.
On a positive note, this placement can have a favorable impact on the educational pursuits of the native. Jupiter being a natural karaka of houses 2, 5 & 9 signifies education, knowledge and spirituality respectively. With this placement in Pisces lagna’s fourth house that governs one's domestic environment and motherly love towards nurturing home and family members, there is indication that the native will achieve academic success and reach new heights in their educational pursuits. They would also possess strong spiritual inclinations.
However since Jupiter is occupying an enemy sign it could lead to problems within family life such as disputes relating to inheritance property or over emotional attachment from mother's side. The individual may find themselves oversensitive towards motherly protection/mother family orientation which may lead to misunderstandings within extended families.
In addition, Jupiter’s affliction also creates issues relating to profession/job/career where workplaces may not be harmonious causing unnecessary stress or clashes which would at times spill over into personal life too.
With regards to aspecting other houses of interest: House 8 governs sudden events/death/inheritance opportunities; considering Jupiter’s powerful aspect over here, natives might inherit wealth through paternal/maternal side.
House 10 has tremendous implications on career advancement/professional growth etc.. under this influence these individuals are likely to grow rapidly within their career/academics. Often their hard work is reciprocated with good opportunities and success at an early age.
The placement of Jupiter in 4th house would make the individual quiet introspective, preferring solitude and may also prevent them from building a strong social network, specifically as they get older.
In conclusion, individuals born with Pisces lagna having Jupiter’s placement in fourth house need to be extremely cautious about issues related to health, profession and domestic harmony. These natives must strengthen their positive traits like spirituality or family values to overcome any negative repercussions resulting from Jupiter’s enemy sign placement in their birth chart. Further it becomes more beneficial if these individuals speak up on matters relating to family life or property so as not to escalate conflicts which would heal relationships and keeping environment amicable both on personal & professional front.