Iro is the major festival that is being celebrated on an annual basis with pomp and pageantry in Erin-Ijesa. Erin people jealously guarded and treasured Iro which they regarded as the goddess of fertility and the soul of the Yoruba nation and its fruitfulness, with Lowabisi as the chief priest. Lowabisi worshipped Iro on behalf of Akinla as Oduduwa himself used to worship it at Ile-Ife. Lowabisi, the Chief Priest of Iro, was very vast in incantations and charms. He was stoic and ascetic. No Lowabisi could afford to be frivolous. He had to be conscious always of his responsibilities towards the Akinla and the community. He was always in seclusion, going through spiritual preparations before the day of worship, which is preceded by a night of rituals shrouded in mystery not normally witnessed by non-indigenes and women. These night rituals done on the eve of Iro worship are called ‘upekuro’.
In the following morning of the night of ‘upekuro’, Lowabisi would mount the Iro effigy called Omoleka. He would emerged from a place called ‘orutu’ (an elevated platform), and announce the dawn of the festival to the Yoruba and particularly members of the Erin community. From the ‘orutu’, he will proceed to the burial ground of the first Akinla called ‘Idi Oodua’ to offer sacrifice and prayers. He would now disembark and go from one corner of the community to the other praying and blessing the people particularly the poor and barren women. He will also move from one sacred shrine to the other within the town. For example, he will move from the Asiko shrine to Owa-Igun and then to the Akinla’s palace; and from there to the Ogun shrine. Lowabisi will finally settle at the Oyigbo-Mekun market where the whole community would have assembled in groups to meet him, dancing to the ancient and ageless ijigereji drum. There is this myth that when the ‘ijiregeji’ drum is beaten during Iro worship, it is heard in certain quarters at Ile-Ife, Oke Ahun in Efon Alaaye and Ikeji. Erin community people would come out in their best dresses chanting various songs with excitement and joy praising Iro. Lowabisi would also worship at the ‘uja’ shrine evoking the spirits of the past Akinlas and of Oduduwa with his ‘eresi’. At dusk, he would retire home waiting for another year when another round of sacrifices, worship, chanting and dancing would be done in celebration of Iro.