Pasuvanthanai also spelt as Passuvandanai is a panchayat village in Ottapidaram Taluk in Thoothukudi district in the Indian state of Tamil Nadu.

April to June are the hottest months and December and January are coldest, with temperatures rising towards the end of February.

Animal husbandry, mostly goat and sheep, has become common due to the difficult dry farming conditions.

Regular bus service operates to places like Thoothukudi, Kovilpatti, Tirunelveli, Kayathar, and Chennai.

The nearest airport is 44.4 kilometres (30 mi) away, at Vagaikulam,(tuticorin) The main deity Kailasanathar is in linga form and it is a Suyambu in origin, goddess is Anadhavalli.

On an ordinary day, visitors could see all the mounts of the deities parked inside the temple premises in the pillared halls.

The Grand Chitirai festival is celebrated with religious fervor and gaiety during the Tamil month of Cithirai.

These inscriptions belong to 1245 AD the period of 7th regnal year of Great King Maravarman SundaraPandiyan II.