街区|がいくgaiku

1. nounblock (of land)

• Synonym区画くかくNeutralRefers to any divided-off area or plot, as in 「区画整理」; broader than 「街区」 and not limited to blocks bounded by roads. Neutral register.
• SynonymブロックNeutralA loanword for a city block or plot of land, but also building blocks and groups or blocs; colloquial and used in many senses.

Use 「街区」 for a city block bounded by roads — a town-planning term. For divided plots of land say 「区画」; in everyday speech 「ブロック」 is the natural choice.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 整備せいびされた市街地しがいちなどで道路どうろで囲かこまれた一ひとつの区画くかく。