How many movies have Ilaiyaraaja and T. K. S. Natarajan collaborated on?

They have worked on 5 movies together! Their first movie together was Aarilirunthu Arubathu Varai (1979) and was their highest rated movie together. They have not worked together since Kadamai Kanniyam Kattupaadu (1987). They are most known for their drama films together.