The Bulbul Tarang (बुलबुल तरंग) literally "waves of nightingales", alternately Indian Banjo) is a string instrument from India. which evolved from the Japanese taishōgoto, which likely arrived in South Asia in the 1930s.
The Bulbul Tarang has evolved through the time. Currently the Bulbul Tarang total 14 Strings which is divided in 3 parts: 2 Main (Melody & Bass) Strings, 4 Jhala Strings and 8 Swarmandal Strings. The strings run over a Fretboard which is known Surpatti in Hindi, while above are keys resembling typewriter keys, which when depressed fret or shorten the strings to raise their pitch.
Taisho Koto, probably first imported into India in the 1930s, which has caught on both in India and Pakistan and become a legitimate instrument, now called Bulbul Tarang (the nightingale's cascading voice) or Indian Banjo.