He was a follower of the Buddha, of whom he was a great admirer.
He appears to have been in the habit of talking to well known teachers of other schools and hearing their opinion of the Buddha, either for the purpose of comparing his own faith in him or of discovering their views.
The Buddha also preached to Jānussoni the Bhayabherava Sutta (M.i.16ff). Jānussoni's permanent residence was Sāvatthi (DA.ii.399), and he often visited the Buddha at Jetavana, consulting him on many topics, such as:
- results of actions (A.i.56),
- sanditthaka-nibbāna (A.i.157),
- tevijja-brahmins (A.i.166),
- fearlessness of death (A.ii.173),
- the ideals of various classes of persons (A.iii.362),
- true celibacy (A.iv.54),
- the Paccārohani ceremony (A.v.233ff., 249ff.),
- the efficacy of gifts (A.v.269ff.), and
- eternalism and annihilation (S.ii.76).
He had a white chariot with silver fittings and white trappings drawn by four pure white mares. He would drive about in this, wearing white garments, turban-cloths and sandals and fanned by a white fan.
The reins, the goads and the canopy were also of white.
Buddhaghosa says that Jānussoni was not his personal name but the name of the rank he held as chaplain to the Kosala king. MA.i.90; according to AA. (i.308) it was the name of any noble family, members of which held this rank. Cp. Govindiye abhisiñci (at D.ii.231).