1.
internet connection, network line
The physical or wireless connection used to access the internet. Refers to both the infrastructure (fiber, cable, etc.) and the connection itself.
Etymology
ネット (internet, from English "net") + 回線 (line, circuit)
Types
Usage
A common everyday term in Japan, especially when moving to a new apartment (setting up internet) or troubleshooting connection problems. Internet service in Japan typically requires contracting both a 回線 (line) and a プロバイダ (ISP/provider) separately, though bundled plans exist.