Before the explosions occurred, Princess Yuna was at Ise-Jingu. It is a most important shrine for the Japanese people, as they believed the large sacred trees and beautifully maintained garden was home to the spirit of Amaterasu himself. Every year, they held a ceremony called Niiname-sai, as a thanksgiving for the abundance of their annual harvests.
Akira had accompanied the Princess who served as a substitute for the Emperor for the ceremony. As such, Oda had a large number of Mazoku warriors, who were now fully armored with customized Samurai-designed Armor and weaponry. Botan had given Oda instructions to always maintain maximum security measures for both of them, as they were both essential for Japan's future.