発はっ展てん中ちゅう

noun, noun which may take the genitive case particle 'no'

under development; in progress

Used for projects, plans, systems, or areas that are currently being developed or are in the process of being built/improved. Often appears in business, technology, and urban planning contexts.

• このアプリはまだ発はっ展てん中ちゅうです。

  This app is still under development.

• 発はっ展てん中ちゅうの地ち域いきには新あたらしい道どう路ろが建けん設せつされている。

  New roads are being built in the developing area.