|Japanese name:||多治比 真佑子|
|School:||Shouan Girls' Academy|
|Grade:||Second-year high school|
|Debut:|| Saki, episode 20 (unnamed)
Saki Achiga-hen, Chapter 19
|Voiced by:||Nozomi Yoshiki|
Mayuko Tajihi is a second year at Shouan Girls' Academy in West Tokyo.
Mayuko has long black hair tied into pig tails and brown eyes. She wears the standard Shouan Girls' uniform.
She is breifly shown during the Saki anime being defeated by Awai Oohoshi during the West Tokyo prefectural finals. In Saki Achiga, Harue Akado and Shizuno Takakamo comment on the match. They say she played pretty well until Awai declared double riichi. Harue also mentions she did amazingly during the individual tournament.