Makiya Yamaguchi
- Title: Makiya Yamaguchi
- Popularity: 2.788
- Known For: Acting
- Birthday: 1973-02-14
- Place of Birth: Sōja Okayama, Japan
- Homepage: http://office-matoba.net/information/actor-actress/makiya/
- Also Known As: やまぐち まきや, 山口 馬木也, 山口馬木也, 야마구치 마키야