Sutanu Mitra was born in Burdwan at Nutanpally. His father Shri Nityananda Mitra was a leading figure of Rabindrasangeet there. At a time when Bengali modern songs swept Bengal, including his home town Burdwan in the 50s and 60s, Shri Mitra was instrumental in popularizing Tagore songs in this historical town. A student of legendary Rabindrasangeet exponent Shri Ashoktoru Bandyopadhaya, Shri Mitra did his Honours in Bengali from Bangabasi College, Kolkata, and Masters from Burdwan University. He taught Bengali first at Raj collegiate school and later at Burdwan Municipal School. He part timed at Padmaja Naidu Music College as a teacher of Rabindrasangeet.
Shri Mitra took his six-year-old son Sutanu to Dr. Dhruvatara Joshi (a well-known student of Ustad Faiyaz Khan of Agra gharana) who was earlier the principal of Sangeet Bhavan, Shantiniketan and later Padmaja Naidu Music College of Burdwan. Dr.Joshi readily accepted Sutanu as his student and trained him the nuances of Indian Classical music for six consecutive years. Dr. Joshi, who penned several compositions famously as “Premrang,” lovingly called his little tiny student Sutanu as “Chhote Ustad.” When Joshiji gave him permission to sing Rabindrasangeet in one of his birthday celebrations, Sutanu surprised everyone with his rendition of “Prochondo garjone asilo e ki durdin darun ghanoghota…”when he was barely second year into his training.
Sutanu completed his Masters in English literature from Burdwan University and took to writing as a potent means of expressing many shades of human mind. He debuted in 14th August: A Letter, a romantic novel, where he explored the hidden recesses of mind and brought them to the surface level to the discomfort of middle-class psyche.