southern country; tropical country
Refers to a country or region with a warm, tropical climate, often evoking images of palm trees and beaches.
I want to enjoy a vacation in a tropical country.
Tropical fruits include things like mango and pineapple.
southern provinces; southern lands
Historical or geographical term for the southern regions of a country, especially in a Japanese context (e.g., Kyushu, Okinawa).
During the Edo period, rare goods were brought from the southern provinces.
I traveled to Okinawa to enjoy that tropical-paradise feeling.
He was raised in the tropics, so he can't handle cold weather.
南洋 refers specifically to the tropical islands and seas of the South Pacific, whereas 南国 more broadly describes any warm southern country or region.
Compound of 南 (south) and 国 (country). The reading なんごく is the standard on'yomi combination.