You need a visa for Fiji if you have a Nepalese passport
Visa options for Fiji
Electronic visitor visa
Travelers need a visa to visit Fiji for Business or Tourism. A Fiji eVisa is the fastest and easiest way of obtaining a visa for Fiji because travelers can submit their applications and supporting documents online. Once the application is approved, travelers receive their eVisa confirmation electronically. A valid visa is required to board the flight. If the visa is expired or doesn’t match the traveler’s passport information, travelers will not be able to board their flight.