"I am in favour of the decision to demonetise Rs 1000 and Rs 500 notes which will help end '2 number ka dhanda' (illegal business)," he said addressing a 'Chetna sabha' here at the start of his second leg of 'Nishchay yatra'.
"I want an attack on benami properties earned through illegal means for more effective results against black money," Kumar, who is also the JD(U) national president, said.
With reports of inconvenience to the masses standing in serpentine queues outside banks and ATMs pouring in from across the country, Kumar demanded suitable arrangements so that the poor and women can change the demonetised high-value notes easily.
Criticising the BJP-led government for "improper" arrangement for undertaking the demonetisation exercise resulting in inconvenience to people, Kumar said he always executed programmes for people after meticulously going through minor details.
Accusing BJP of turning its election promise on black money to 'jumla' (false promise), Kumar claimed, "We are not jumla baaz (practitioner of jumla). I make only those promises to people which can be executed."
During the second leg of his 'Nishchay yatra', Kumar informed the people about the programmes launched to realise his 'seven resolves' and also the "good results" prohibition is yielding.