apartment-size tatami mat (170 cm × 85 cm)
A tatami mat size commonly used in apartment complexes (団地). Slightly smaller than the standard 江戸間 (176 cm × 88 cm).
See also: 江戸間
Apartment-size tatami mats are slightly smaller than Edo-style ones.
This room is six tatami mats in the apartment-size standard.
Compound of 団地 (apartment complex) and 間 (space, room size). Refers to the tatami size commonly used in public apartment housing.