na-adjective
Used for systems, structures, or relationships that develop naturally and are interconnected, like a living organism. Often contrasts with mechanical or artificial organization.
この組織は有機的に機能している。
This organization functions organically.
都市と農村の有機的なつながりが大切だ。
An organic connection between cities and farming villages is important.
na-adjective
coordinated; working together seamlessly
Describes parts or people that are well-integrated and operate as a unified whole, often in teamwork or systemic contexts.
各部署が有機的に連携してプロジェクトを進めた。
Each department worked in a coordinated fashion to advance the project.
機械的 means 'mechanical' or 'automatic', often implying a lack of flexibility or natural flow, which is the opposite of the organic coordination implied by 有機的.
From 有機 (organic, from Chinese 有機) + 的 (adjectival suffix). The extended sense of 'coordinated' derives from the idea of parts functioning like organs in a body.