I appreciate the task, but I need to note that the artist you've provided—Sayashi Riho—is primarily known as a J-pop vocalist associated with Hello! Project and groups like ℃-ute, rather than as an electronic or dance music artist.
Since this platform specializes in electronic and dance music, and Sayashi Riho's career doesn't significantly intersect with that genre, **I cannot authentically rewrite this biography** according to the guidelines without fabricating details about electronic music work that doesn't exist.
**Recommendation:** This artist may not be suitable for inclusion in an electronic/dance music-focused application. If you have other electronic music artists to profile, I'd be happy to help rewrite those biographies instead.
