Former state secretary-cum-spokesperson of Jharkhand unit of BJP Prem Kataruka and other three prominent leaders of Shibu Soren-led Jharkhand Mukti Morcha (JMM) and Babulal Marandi-led Jharkhand Vikas Party-Prajatantrik (JVM-P) on Sunday joined Bihar’s ruling JD(U) here in presence of CM Nitish Kumar.