ken (間, literally 'space') is a Japanese Go term and a measure of distance between two stones.
ken counts the number of empty intersections in a straight line (horizontal or vertical) between the stones. The term is used for almost any combination of stones:
- For stones of same color
- For stones of different colors
The term is vocalized when combined with san (3) as sangen.
In English, the equivalent word is "space" or "point" (as in one point jump).