Chiba Lotte Marines announced that they will be holding a sponsored game with Lotte Corporation, titled "Cool and Blue, Summer Has Arrived: Coolish & So Day," against Fukuoka Softbank on Monday, July 20th (holiday), and that Hoshimachi Suisei and Hatsune Miku, who appear in TV commercials for Lotte's two brands "Coolish" and "So," will be in attendance.

On the day of the event, Hoshimachi Suisei, a highly popular VTuber, will deliver the ceremonial pitch, while Hatsune Miku, the virtual singer also known as the "electronic diva," will liven up the event from the screen.

▼Comment from Hoshimachi Suisei▼
"I'm thrilled to announce that I'll be throwing out the first pitch at a Chiba Lotte Marines game! I never thought the day would come when I'd stand on mound in a stadium...! I'll do my best to throw a blazing fastball!! I'll do my best to liven up the stadium, so please cheer along with me!"

▼Hoshimachi Suisei's Profile▼
A virtual idol who continues to forge a path in the music scene, wielding her overwhelming presence with her singing as her weapon. She has produced numerous hit songs, including her signature tracks "Stellar Stellar" and "Bibbidi-Ba," with "Bibbidi-Ba" being the first song by a VTuber to surpass 100 million cumulative streams on Billboard JAPAN. In addition to holding live performances both domestically and internationally, her video works have also gained international acclaim, demonstrating her versatility across the boundaries of virtual and real. In 2026, she will establish her own agency, "Studio STELLAR," and plans to hold her largest-scale arena tour to date that same year.

▼Hatsune Miku's Profile▼
Hatsune Miku is a software developed by Crypton Future Media, Inc. that allows anyone to create songs by inputting lyrics and melodies. A large number of creators used Hatsune Miku to make music and posted it online, sparking a major movement. She also gained attention as a character, and now, as a virtual singer, she is active in many areas, including merchandise development and live performances, and her popularity has spread worldwide.