relationship chart; relationship diagram
A diagram showing connections between people, characters, or entities. Often used for family trees, organizational charts, or character relationship maps in fiction. Compare 相関図, which is more common for correlation diagrams.
See also: 相関図
A relationship chart of the characters was released on the drama's official website.
I created a relationship diagram between departments for the meeting.
Compound of 関係 (kankei, 'relationship') and 図 (zu, 'diagram, chart').