The festival is celebrated in Manipur, Assam and Tripura states in North Eastern India and observed by some in the neighboring Myanmar.

[4] Imoinu is believed to be an incarnation of Leimarel Sidabi, wife of Supreme God Sidaba.

[3] Imoinu Iratapa is celebrated on the 12th of lunar day of the Wakching month of the Meitei calendar.

[7] Imoinu Iratapa is a festival of lights, celebrated by the Meitei people following the traditional religion Sanamahism.

[3][6] A good meal with fish curry as the main dish is offered to the deity at the funga lairu, the traditional fire place in the kitchen.

The procession is led by Maibas and Maibis, wherein the idol of goddess Imoinu is taken to Meitei households amongst song and music.