Koshi Pradesh Ban Rakshak Syllabus 2080 | Koshi Pradesh | Ban Rakshak | Forest Guard Koshi Province is the autonomous easternmost province adopted on 20 September 2015 by Constitution of Nepal. The province is rich in natural resources, tourist attractions, recreational activities, and natural beauty. The province covers an area of 25,905 km2 (10,002 sq mi), about 17.5% of the country’s total area.