"This is the first time that Prime Minister of India has taken a move to open the classified files. But these are not the intelligence files. What we need is the intelligence files not only of our country but also of Russia, the UK, the US, Japan to solve the mystery," Bose's grandnephew Surya Kumar Bose said.
The NAI also plans to release digital copies of 25 declassified files on Bose in the public domain every month.
Asked about the political implication of declassifying of the files at a time when West Bengal is gearing for Assembly election this year, Surya said, "I think that is definitely going to have a side effect to it (politics). For politics, there is always a political motive. Let's be quite frank about it."
On whether the declassifying cleared the mystery of Netaji's death, he said, "We did'nt expect that. It is a monumental task as there are thousands of files. A high level investigative team as well international authority participation is required."
In October last year, the Prime Minister had met the family members of Netaji and announced that the government would declassify the files relating to the leader whose disappearance 70 years ago remains a mystery.
Ashish Ray, the creator of British website
www.Bosefiles.Info set up to catalogue the last days of Netaji, also welcomed the declassifying of files.
"I warmly welcome the Indian government's decision to declassify files in its possession relating to Subhas Bose. It is better late than never.
"I would also like to congratulate those who have been campaigning for the release of such files for some time now for their steadfast efforts, which have today seen fruition.
"I appeal to the government and people of India to support Bose's daughter Professor Anita Pfaff in her quest to carry out a DNA on the mortal remains preserved at Tokyo's Renkoji Temple. This should scientifically establish whether the remains are his or not," he said in a statement.