Ningyo Kansatsu Nikki

A man works as a mermaid researcher, documenting his observations and experiences in a field that is both mysterious and unconventional. He travels to various locations where mermaids are said to appear, collecting data and trying to understand their behavior. His work is based on real-life sightings and folklore, and he approaches the subject with a scientific mindset. The narrative is presented through his journal entries, offering a personal and methodical account of his encounters. The story does not include fantasy elements or fictional characters—everything is based on the protagonist’s real-world investigations and the cultural beliefs surrounding mermaids.