Noun + にわたる / Noun + にわたって

[Spanning / Covering / Over (a range/period)]

Connection: Noun + にわたる / Noun + にわたって

Usage: Expresses that something spans or covers a wide range, area, or extended period of time. Used with quantities, time periods, or areas to emphasize breadth or duration. にわたる modifies nouns; にわたって connects clauses. Common in formal/written Japanese.

Note: Distinguished from N3 にわたって by N2's broader usage patterns including にわたる as noun modifier and more complex constructions.

Examples:

3日間にわたる会議がようやく終わった。(The conference spanning three days has finally ended.)

広い範囲にわたって被害が出ている。(Damage has occurred over a wide area.)

長年にわたる研究の結果、新薬が完成した。(As a result of research spanning many years, a new drug has been completed.)