"I welcome the DMK initiative... The outcome of the meeting will bring pressure on the Centre and Karnataka governments to ensure availability of water for Tamil Nadu and Puducherry," he said.
The DMK convened it as the Tamil Nadu government had not convene a joint meeting of leaders of all political parties on the issue, he said.
Speaking to reporters on the sidelines of his campaign in Nellithope for the November 19 bypoll, he said the rights of Tamil Nadu and Puducherry in the Cauvery water issue could not be ignored.
The meeting, chaired by M K Stalin, DMK Treasurer and Opposition Leader in the Assembly, was boycotted by AIADMK, BJP and all constituents of the four party People's Welfare Front, comprising MDMK, CPI(M), CPI and VCK.
On September 15, Congress MLA A John Kumar had quit his post to pave the way for Narayanasamy to seek election from Nellithope assembly constituency and become an elected member.