1.
city block, district (in addresses)
A counter suffix used in Japanese addresses to indicate a numbered subdivision of a neighborhood.
丁目 is a counter suffix used in Japanese addresses to indicate numbered subdivisions within a neighborhood (町). Each 丁目 contains multiple 番地 (lot numbers).
Cultural note
Japanese addresses run from largest to smallest unit:
都道府県 → 市区町村 → 町名 → 丁目 → 番地 → 号
Counting patterns
Usage
When giving addresses verbally, the number comes before 丁目 with no particle between them. In written addresses, Arabic numerals are standard (3丁目). Japanese addresses go from largest to smallest unit, the reverse of Western address order.