noun
Refers to a physical marker along a road or path showing distance, often in traditional Japanese measurements. Can also be used figuratively for a significant stage or event.
旧街道には里程標が残っている。
Mileposts remain along the old highway.
このプロジェクトの完了は大きな里程標だ。
The completion of this project is a major milestone.
Compound of 里程 (distance in ri) and 標 (marker, sign). The term is straightforward and transparent.