On the 25th, Rakuten Eagles announced that voice actor Koichi Yamadera, who hails from Miyagi Prefecture, will throw out the ceremonial first pitch at the "Strongest Entertainment Declaration! Rakuten Eagles Ticket Day" game against Softbank Hawks on April 1st (Rakuten Eagles Mobile). Yamadera commented, "This will be my first time throwing out the first pitch at Rakuten Eagles Mobile's Saikyo Park Miyagi, which is a sacred place for me. As a 64-year-old with almost no baseball experience, I will throw with all my might to express my gratitude to The Eagles, who have continued to give hope to Tohoku. Please watch with warm eyes."

In addition, it has been decided that the idol group "ALETTA" will also be there to support the ceremonial first pitch. The junior members of the agency were full of enthusiasm, saying, "We will be participating in the ceremony to support our senior colleague, Koichi Yamadera, as he throws the first pitch. We are very happy to have this valuable experience of being able to watch the first pitch from up close, and we will do our best so that the next time we come to Rakuten Eagles stadium, we will be the ones to throw the first pitch!"