Make sure to connect her work to broader cultural trends in Japan during the 80s. Maybe mention the economic boom and how City Pop reflected that era. Also, the resurgence of her music in today's Kawaii culture or through anime references.

Her work embodied the zeitgeist of Japan’s economic golden age, where technological progress and optimism collided. Songs like spoke to a generation reveling in possibility, while her English-language track "My Love, My Life" (1984) aimed to bridge cultural divides, though it faced limited international success at the time. Legacy and Revival Though Hayama’s active career waned in the late 1980s, her music found a second life in the 2010s amid a global City Pop resurgence. Streaming platforms like Spotify and YouTube have reintroduced her to younger audiences, with "Shiawase na Hito" surpassing 100 million views on YouTube. Nostalgic anime, fashion, and Kawaii subcultures have embraced her as an icon of a bygone era.

Next, I should highlight her contributions to the City Pop movement. Mention artists like Toshinobu Kubota, Yuki Itoh, and how Hayama fits into that. Her style was more pop with J-pop and City Pop elements. Also, her international work in the 80s—she had English and Mandarin songs, which might not be widely known.

Wait, the user might be looking for an academic essay, so proper structure and references. But since it's a general essay, maybe keep it more accessible. Avoid jargon but explain terms like City Pop for readers unfamiliar.

Need to conclude with her lasting legacy and how she's remembered. Maybe mention tribute bands or re-releases. Also, compare her with contemporary artists in the same space to highlight her unique place.

I should include some key songs. "Shiawase na Hito" and "Nakayoshi de ita" are her big hits. Maybe mention her collaborations and how she blended different musical styles. Also, her visual style was very of the 80s, with bright colors and bold fashion, which complements City Pop's aesthetics.