Indicates a medium, means, or intermediary by which something happens or is communicated. Often used with nouns like インターネット, 友人, or 経験.
throughout; all through; all over
Describes something happening continuously over a period of time or across an entire area. Common with time nouns like 一年 or 一生, and location nouns like 全国.
You can connect with people all over the world through the internet.
I got to know her through a friend.
In this region, a mild climate continues throughout the year.
The singer is popular all over the country.