Is the ShinMaywa US-2 a good aircraft, and should other countries buy something similar?
Short answerIt suits Japan's island geography. India, the Philippines, and possibly Singapore could find similar flying boats useful for maritime access and resupply.
NotesJapan's island geography gives the ShinMaywa US-2 flying boat a clear purpose. India and the Philippines are proposed as other countries that could find such aircraft useful. For the Philippines, a flying boat could help resupply positions whose sea approaches face interference from maritime militia. Singapore is another suggested user because it has limited land and relatively abundant water access. These proposed uses depend on geography and access needs; no detailed procurement-cost comparison is offered.