Spoiler
It's the 2023 "Human Shogi" event in Tendo City, Yamagata Prefecture.
Of course.
Tendo Ningen Shogi 2025 - April Events in Yamagata - Japan Travel
Ningen Shogi is a “Human Chess” event that occurs every April in the city of Tendo, Yamagata. Set under rows of blooming cherry blossom trees, Ningen Shogi is the most popular activity during Tendo’s annual Sakura Matsuri.
Hockey is starting to catch on in Japan and they are certainly practicing with armor for the increased weight, like using a bat weight in a batting cage.