So... is Hinomaruzumou finished or not?
NO, it is not finished.
Why?
We found unfinished non-core content:
Hinomaruzumou: Shijuuhatte (Side Story)
We could not confirm the source content in MangaUpdates.
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
Hinomaruzumou follows Ushio Hinomaru, a talented but undersized sumo wrestler with aspirations to reach the very top of the sport.
Professional sumo has no weight classes, making Ushio's smaller stature a major obstacle.
His only path to going pro lies in winning the High School Yokozuna title, but time is running out.
Instead of joining a powerhouse sumo school, Ushio chooses to build a team at Odachi High, turning a near-defunct club into a contender.
The story focuses on his struggle against seemingly insurmountable odds, as he aims to prove that size isn't everything in the world of sumo.