The Days of Diamond

The Days of Diamond (ダイヤモンドの功罪) is a Japanese manga series written and illustrated by Ōhashi Hirai. It has been serialized in Shueisha's seinen manga magazine Weekly Young Jump since February 2023.

Plot
Jiro Ayasegawa is a fifth-grader who is immensely talented in sports, but finds only misery in his successes—he desperately wants to make friends in sports, but is ostracized by his peers whenever he outperforms them. Seeing a flyer for the Adachi Bambies, an amateur little league team, he decides to try baseball, with the hope that a team sport like baseball means that everyone is on his side. However, the team coach sees his potential as a pitcher and decides to have him try out for the national teams.

Publication
Written and illustrated by Ōhashi Hirai, The Days of Diamond started in Shueisha's seinen manga magazine Weekly Young Jump on February 9, 2023. Shueisha has collected its chapters into individual tankōbon volumes. The first volume was released on June 19, 2023. As of June 19, 2024, six volumes have been released.

The series is simultaneously published in English on Shueisha's Manga Plus web platform.

Reception
The series ranked seventh in the ninth Next Manga Award in the print category in 2023. The series topped Takarajimasha's Kono Manga ga Sugoi! list of best manga of 2024 for male readers. The series has been nominated for the 17th Manga Taishō in 2024, and placed fifth with 56 points. The series ranked fourth in the Nationwide Bookstore Employees' Recommended Comics of 2024 list.