Yokoyama is a common Japanese surname. While the provided source material does not identify it as a specific city or geographical location, it lists numerous notable individuals who bear the name across various professional fields.
The surname is associated with diverse figures in Japanese culture and history, including athletes such as footballers, golfers, and volleyball players. It is also held by prominent artists, musicians, and historical figures, ranging from Imperial Japanese Army generals to traditional shakuhachi flute teachers and manga artists.