Janki was born on March 20th, 1909. Janki's father was Kunjan Mistry and her mother was Gangu Amin. Her maternal grandparents are <Unknown> and <Unknown>. She had two brothers and two sisters, named Ramkrishna, Madhav, Parvati and Yamuna. She died from cancer at the age of 100 on October 2nd, 2009 in Mumbai. She was cremated in Mumbai.