Born in Hyogo Prefecture, Sayuri Ueda (上田 早夕里, Ueda Sayuri) is one of the more innovative science fiction authors in Japan. She made her debut in 2003 with Kasei daku barado (Mars Dark Ballad), which won the 4th Komatsu Sakyo Prize. She has published a series of highly original, much discussed works, gaining avid fans not only in Japan but throughout Asia and the West. Karyu no miya (The Ocean Chronicles) won the Hayakawa Publishing “SF ga Yomitai!” Award for Best Japanese SF Novel in 2010, as well as the 32nd Japan SF Award and 10th Sense of Gender Award in 2011. She also writes actively in genres other than science fiction, and in 2018, her historical novel Hametsu no ō (The King of Ruin) was nominated for the 159th Naoki Prize.
An epic, apocalyptic sci-fi epic about the oceans that depicts humanity in the face of an unprecedented sea level rise of 260 meters. The game is set in a futuristic society that has been strongly affected by global warming and environmental change, and at its core lies the conflict between two different societies: landers and seafarers. As a result of the submergence of much of the land, serious feuds and tensions have arisen between the two, and their relationships have become increasingly complicated. These conflicts do not arise simply from geographical differences, but also from cultural, value, and historical backgrounds.
The protagonist of the game is Aozumi Seiji, a diplomat for the Japanese government. As he scrambles to resolve conflicts between the government and maritime people in Asian waters, he encounters various difficulties at the negotiating table. In particular, his negotiations with Tsukisome, the female head of the maritime people, shake his fate significantly. Tsukisome is unique in that she has a human form but lacks language skills, and her brain surgery to acquire thinking and language is an important factor in understanding her actions and thoughts.
Overall, this work delves deeply into the various difficulties and ethical dilemmas facing humanity in the future. The emotions depicted in the story — hope and despair, love and hate — are universal themes that resonate with everyone. Hands down, it's a deep subject.