The word Karaka means a 'significator' or a planet which represents particular things of human life such as marriage or children or job etc. For ex: Venus is karaka for marriage.Bhava means house
and Nashya means destroyer.
In order to understand the implications of this concept, I researched alot. During my research, this concept has almost failed in some particular cases. I would like to share few instances. I studied a person’s chart. I saw Jupiter in 5th house and found the person blessed with good children. However, for Venus in 7th house, this concept is applicable in few cases.
For more comprehensive view, read below my detailed research report on this principle:
1. Sun and 10th house, both are karaka for job. So, according to this rule if sun is placed in 10th house then the native won’t enjoy good professional life. But it’s not true! The reason is according to Shad bala concept, sun gets digbala (directional strength) when it’s placed in 10th house. It means sun is very powerful when it’s placed in 10th house. The native will enjoy respective career life. So this rule failed here.
2. Jupiter is the karaka of the 2nd, 5th, 10th and the 11th house. So when Jupiter is placed in any of these houses, then according to this rule, it will destroy the house related matters. For instance if Jupiter is placed in 2nd house then it will spoil the wealth, family matters of an individual. But, according to me, this is untrue. In my experience, I have seen lot of people who are born with Jupiter in 2nd house, enjoying good wealth and family. Wherever Jupiter is placed, it will bring positive strength to that house expect some cases.
3. Mars is the karaka of the 3rd and the 6th house. So when Mars is placed in 3rd house, it will destroy your siblings, courage etc because 3rd house represents siblings and courage. But, I have come across the people whose 3rd house has Mars but they still have good relationships and are brave.
4. Venus and 7th house both are karaka for marriage. So when Venus is placed in 7th house, it must give bad results in married life. For very few cases but not all, this rule works. To prove my point, I would like to share one of my case studies. I came across a boy born in cancer ascendant with Venus in 7th house. This boy suffered in his marriage life and got divorced. The reason was that Venus was destroying 7th house related things as per the principle of "Karako Bhavo Nashaya".
I would like to conclude that "Karako Bhavo Nashaya" does not work for all cases such as Jupiter in 5th house will not spoil the 5th bava. I have experienced this in many cases. With the exception of few cases such as Venus in 7th house, this rule is not applicable for most of the cases.