noun
readership; number of readers
Used for the total number of readers of a publication such as a magazine, newspaper, or website.
この雑誌の読者数は年々減っている。
The readership of this magazine is decreasing year by year.
新聞の読者数がインターネットの普及で減少した。
The number of newspaper readers has declined due to the spread of the internet.
Compound of 読者 (reader) and 数 (number).