noun
Edo-ma pillar spacing; standard pillar distance in eastern Japan
Refers to the traditional module used in Japanese architecture, specifically the center-to-center distance between pillars in the Kanto region, approximately 182 cm. Contrasts with 田舎間 (inaka-ma).
See also: 田舎間
この古い家は江戸間で設計されている。
This old house is designed using the Edo-ma module.
noun
Kanto-size tatami mat
A tatami mat made to the Edo-ma standard, typically about 176 cm by 88 cm. Slightly smaller than the Kansai-area 京間 (kyō-ma) mat.
See also: 田舎間
江戸間の畳は京間より一回り小さい。
Edo-ma tatami mats are a size smaller than Kyō-ma mats.
京間 is the larger Kansai-area tatami and pillar-spacing standard (approx. 191 cm pillar spacing, tatami about 191 cm by 95.5 cm).
Compound of 江戸 (Edo, old name for Tokyo) and 間 (ma, 'space' or 'interval'), referring to the architectural module used in the Edo (Kanto) region.