Circled M

A circled capital letter “M” in blue.

The Ⓜ️ Circled M emoji is often used to represent the Tokyo Metro subway system in Japan, where it appears on signage for Marunouchi Line stations. More broadly, it can stand for the letter “M” in various contexts, such as initials, branding, or to indicate “metro” or “mass transit.”

• Represents the Marunouchi Line in Tokyo Metro.
• Used for the letter “M” symbolically or decoratively.
• Can indicate transportation, metro stations, or branding.