Hashimoto Kanna, a popular Japanese actress and idol, recently charmed crowds by throwing the ceremonial first pitch at a baseball game while dressed in a "River Otter" costume. The event took place in Japan, attracting mass media attention for Hashimoto's playful choice of attire, originating from a character she is portraying in an upcoming movie.

In Japan, first-pitching ceremonies often involve popular celebrities and are seen as an entertaining way to start off a ball game. The choice of costume signifies the powerful effect of drama or pop culture on people. Hashimoto Kanna's presence and her unique costume added excitement and drew considerable attention, demonstrating the star power she possesses within the Japanese entertainment milieu.

In the US or EU, similar practices may occur, with local stars or celebrities sometimes invited to open games or other sporting events. The choice of costume though may not always tie in with promotion of upcoming movies or drama series, unlike in Japan where it is often used as a marketing strategy.