Morang Sunsari Welfare Society (known as MOSU in short) is an institutionalized and incorporated social organization. The movement of this organization was initiated in 2001 in Qatar. The aim of this institute was to unite all permanent residents of Morang and Sunsari district working in Qatar to support motherland. Later this organization was formally registered in Government of Nepal in 2012 (BS 5 Paush 2068) under social organization act and the aim has been changed to unite all permanent residents of Morang and Sunsari district working globally. The central office of the organization is established in Itahari Sunsari and it has country branch committees in Qatar, Oman, UAE, Bahrain, Kuwait and Japan. It is in process to establish country branches in Hong Kong, Korea, United Kingdom, United States of America, Australia and European countries.
The ad-hoc committee of MOSU Nepal was formed on 11 December 2011 before registering in Government of Nepal and it was led by Mr. Basudev Khadka. The first General Assemble was 7th April 2012 and a committee was formed on leadership of Mr. Gajendraman Khatri. Consequently MOSU Nepal was led as President by Mr. Chhabi Prasad Subedi (29 June 2013), Mr. Gokul Bahadur Thapa, Badri Prasad Bimali and currently Mr. Ramnath Bhadari is leading the team since October 2017.