A special first baseman pitch ceremony featuring Hoshimachi Suisei and Hatsune Miku was held before the Lotte-Softbank Hawks game at Zozo Marine Stadium.

During the ceremony, Suisei Hoshimachi and Miku Hatsune appeared on the stadium's main vision. While Miku Hatsune cheered them on, Suisei Hoshimachi stepped up to the mound. first baseman In front of the pitch, Suisei Hoshimachi commented, "I'll do my best aiming for a blazing fastball!!" Amid the spotlight, the pitch she threw was a brilliant strike pitch, and the speed gun in the stadium displayed 105 km/h. first baseman During the pitch ceremony, a special performance was held where the stadium's main vision and mound were linked together.

Furthermore, the event held on the same day was sponsored by Lotte Co., Ltd. as "Cool and Blue, Summer Has Arrived: Coolish & So Day," and Hoshimachi Suisei and Hatsune Miku appeared in TV commercials for Lotte's "Coolish" and "Soh" ice cream.