He was closely associated with directors such as K. During the 1960s-70s, Kalanilayam revolutionised Malayalam theatre, with its dramas like Raktharakshass, Kayamkulam Kochunni, Kadamattathu Kathanar, Iravikkodu Pillai, Naradan Keralathil, Taj Mahal, Sree Guruvayoorappan and Alavudinum Athbhuthavilakkum, all simultaneously with his illustrious career in films. He was a partner of the Kalanilayam Theatre group, for which he wrote many plays. Many of his screenplays were published and enacted by amateur theatre groups all over Kerala.

Kochukrishnan wrote many plays for the radio, crossing over to writing more than twenty plays for professional theatre, and subsequently films. Later, he joined the All India Radio as a staff artist where he worked as a programme executive at various stations and subsequently rose to the position of Station Director. He started his career as an employee at the palace. A road in Cotton Hill, Vazhuthacaud, Thiruvananthapuram is named after him. He died of old age diseases in 1997 at his Thiruvananthapuram residence. He was married to Prasanna (Ponnamma) from Edavanacaud had three children: Jagathy Sreekumar, P. Kochukrishnan’s father was Kottaram Moothchari under Moolam Thirunal and Chithira Thirunal Balarama Varma of erstwhile Travancore. His grandfather Krishnan Achari and his brother were given land to settle down in Jagathy. Kochukrishnan's paternal ancestors were involved in the construction works of many palaces and stately mansions in Travancore built during the latter half of the nineteenth century. After obtaining a BA in Literature, he followed up with a degree in Law. He had his education in Thiruvananthapuram and Scott Christian College, Nagercoil. Kochukrishnan Achary was born in 1924 at Krishnavilasam in Jagathy, Trivandrum, then capital of Travancore, to 'Ananthapadmanabhan' Nanu Achary and Ponnammal.

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