Japanese Prime Minister Shinzo Abe was a special guest at Sunday's parade in the Indian capital, the highlight of the annual Republic Day festivities.
Schoolchildren, folk dancers, and police and military battalions marched through New Delhi, followed by the military hardware display and folk dances. India adopted its democratic Constitution on Jan. 26, 1950.
Similar parades were held in Indian states, including Jammu and Kashmir and Manipur, where separatist militants don't accept Indian rule and called for general strikes.
Four low-intensity explosions marred the celebrations in Imphal, the capital of remote northeastern Manipur state, but did not cause any damage or casualties, police said.