So... is Sansha Sanyou finished or not?
NO, it is not finished.
Why?
The anime finished before the manga:
Anime finished: June 27, 2016
Manga finished: December 07, 2018
MangaUpdates contains information about the anime adaptation and indicates that it is incomplete.
Watching Order (by release date)
Here you have all the anime relations we detected ordered by release date, so you can see the reason for this status in context and also use it as watching order.
The mangas and the non-core contents are excluded by default, but you can enable them by clicking the buttons below:
Synopsis
Sansha Sanyou tells the story of three high school girls who become unlikely friends.
Youko Nishikawa, once a wealthy girl, is now adjusting to a normal life after her family's business fails, trying to shed her privileged persona and make friends.
She meets Futaba Odagiri, an incredibly energetic transfer student, and Teru Hayama, a seemingly sweet girl with a surprisingly sharp tongue.
Despite their vastly different personalities, these three girls, each with "leaf" in their name, form a close bond as they navigate the humorous and unpredictable experiences of high school together.
The anime focuses on their daily lives, highlighting the challenges and joys of friendship, school, and adolescence in a lighthearted way.