noun
male demographic aged 20–34; M1 demographic
A marketing and media term for men in their 20s to early 30s, often used as a target audience segment. The 'M' stands for 'male' and '1' for the first age bracket.
この番組はＭ１層をターゲットにしています。
This program targets the M1 demographic (men aged 20–34).
Ｍ１層の視聴率が高い時間
We air commercials during time slots with high viewership among the M1 demographic.