It was based on demand under badawi in 2006. Then, china visitirs were given visa free entry, so can enter easily from sinkie.hence the reason for china developers to build in JB.
Najib or zahid stopped the visa free entry, and based on current court case, due to kick backs they will make by outsourcing visa processing to private company.
That, plus increased in minimum price foreigners can purchase a home from RM500k to RM1 mil finally killed johore real estate.
I was surprused, johore MB and sultan did not protest when those were implemented.
Dr m reduced the minimum price of homes foreigners can buy to RM600k, and implement visa free entry, but way too late. Xi jinping stopped the money flow.