alternative station name; supplementary station name
A secondary name given to a railway station, often in parentheses or smaller text, used for nearby landmarks, institutions, or neighborhoods. Common in Japanese train systems.
Tokyo Metro stations often display an alternative station name.
The supplementary station name for this station is 'Tokyo Tower-mae'.
Compound of 副 (ふく, 'sub-', 'secondary') and 駅名 (えきめい, 'station name').