|Series:||AKB48 Murder Mystery|
|First Appearance:||File 4|
|Last Appearance:||File 5|
|Number of Episode|
|3 (Files 4, 5 and Testimony File)|
- "The song that was playing on Yuko-chan’s phone, I feel like it was the same one playing on Renacchi’s phone. Which song was that… Being that it’s the same song both times, it’s probably a message from the culprit."
- ―Matsui Sakiko's Testimony[src]
Matsui Sakiko (松井咲子?), nicknamed Sakippe (さきっぺ?), is a member of AKB48's Team K. She is one of the major characters in AKB48 Murder Mystery series. She was based on and was portrayed by Matsui Sakiko.