Nagisaen is in Shizuoka. This was a special outdoor concert. Great to watch on Blu-ray but my friends who were there say it was really hard physically because it was so hot and the acoustics weren't great due to being outdoors and such a large venue. My best guess for the shot with all the mosh pits converging at once is that it could be during "Mighty Long Fall."
The multiple mosh pits simultaneously converging was actually during Cry Out. I was a new fan in 2020 so when I saw that part during their pandemic weekly RU-vid streaming, I was literally in so much awe I could cry 😂. The screenshot of that scene is still in my phone until now. 😅