Shinohayu the Dawn of Age

Shinohayu the Dawn of Age (シノハユ the dawn of age) is a Japanese manga written by Ritz Kobayashi and illustrated by Aguri Igarashi. The manga is published by Square Enix and began regular serialization in Big Gangan on September 25, 2013. The manga has collected eleven volumes as of May 25, 2019.

Story
A prequel to the Saki series based on the older characters, mainly professional players.

The story begins with a reunion during the 71st Inter High School Mahjong Championships of the professional players Harue Akado, Hayari Mizuhara, Sukoya Kokaji, and Risa Noyori, who competed in a semifinal match in the 61st Inter High School Mahjong Championships 10 years ago, as well as Yoshiko Kainou.

The main character, Shino Shiratsuki, is looking for her mother who has disappeared.

Shino Shiratsuki
Shino is the main protagonist of Shinohayu Dawn of Age and is trying to find her mother.

Kanna Ishitobi
A girl who says she doesn't like mahjong and only plays for the challenge. She has a one sided rivalry with Hayari.

Hayari Mizuhara
Hayari is a color commentator for the inter-high and a professional mahjong player. She is an alumnae of Asakumi Girls' High School.

Kyouka Inamura
Best friend of Kanna. A level headed girl who took up mahjong in order to have fun with her friends Kanna and Shino.