Yuhane Yamazaki, who restarted as a solo artist in October 2025, releases her 5th single, "Osaho-san". Set on a summer night, "Osaho-san" depicts the give-and-take between two people in love. What the "osaho" of the title means is the unspoken rules of romance and the delicate sense of distance that arises between the two. Even while they are aware of each other's feelings, they deliberately pretend not to notice, or hide their true feelings, and the song takes as its theme these "manners" that belong only to love. The sound is a band sound that takes in, as an accent, tones that convey a Japanese feel, such as the wooden fish drum. It crosses an atmosphere reminiscent of a Japanese summer festival with the drive of rock, and is finished into a song that conveys the heat and elation of a summer night. Furthermore, among the songs since she began her solo activities, this one places a particularly high weight on dance performance, and she expresses the give-and-take of love and the world of the song not only through singing but also through choreography and facial expressions. An energetic performance number that lets you fully enjoy the singing, dancing, and expressiveness of Yuhane Yamazaki has been completed. *Please note that the official notation for the "saki" character in Yuhane Yamazaki's name is the "tatsusaki" variant.