noun which may take the genitive case particle 'no'
Used as a no-adjective to describe something in the process of development, such as an industry, town, or economy. Often appears in the compound 発展途上国 (developing country).
この地域はまだ発展途上の段階にある。
This region is still in a developing stage.
発展途上国への支援が重要だ。
Support for developing countries is important.
Compound of 発展 (development) and 途上 (on the way, in progress).