Singh will visit Islamabad tomorrow for the SAARC meeting.
Bhagvan Sarman Solanki, who hails from Tad village of Una tehsil in Gir-Somnath district, was apprehended by Pakistani authorities in April 2015 for entering the Pakistani waters.
"I have made this request to Singh on the eve of his departure to Pakistan," said Bokharia.
Solanki's family members yesterday said he was not well and was in coma.
"Why was my father's name not on the list of 18 fishermen who were released from a jail in Pakistan on June 6?" asked Sanjay Solanki.