This is the 7379th most frequent Japanese word.
以北
"以北" means "north of" or "to the north of."
This sentence uses '以北' to specify the regions located geographically north of Tokyo, indicating direction and location.
東京以北の地域では寒い気候が続いています。
In the regions north of Tokyo, the cold climate persists.
Here, '以北' refers to locations geographically north of Honshu and sets a range in terms of geography.
この植物は日本の本州以北でよく見られます。
This plant is commonly seen in areas north of Honshu, Japan.
In this case, '以北' denotes areas geographically positioned north of Hokkaido, indicating a spatial scope for the investigation.