Professor Masashi Ohara is a Japanese botanist and plant ecologist whose decades of research have contributed to our understanding of the biology, ecology, and evolution of Trillium, a distinctive spring wildflower found in the forests of Japan and North America. For more than four decades, Professor Ohara has studied the evolution, reproduction, genetics, and ecology of Trillium species in Japan, as well as their comparative life histories in Japan and North America. During his doctoral studies, he conducted research on North American Trillium at the Carnegie Museum of Natural History in Pittsburgh, in collaboration with botanist Frederick H. Utech. His comparative studies across Japan and North America have provided a broader perspective on the diversity and evolution of Trillium life histories. His long-standing career at Hokkaido University in Sapporo provided a foundation for extensive field research and long-term studies of these fascinating woodland perennials. He is now Professor Emeritus at Hokkaido University. Professor Ohara’s research has focused particularly on the life histories of Trillium, exploring how individual plants grow, reproduce, change through their lifetimes, and persist within forest ecosystems. A defining feature of his work is the combination of detailed field observation with long-term demographic studies. By following individual plants and populations over many years, he has helped reveal aspects of the life cycles of Trillium that cannot be understood through short-term observations alone. His research has also examined the reproductive ecology and seed dispersal of Trillium, including the fascinating relationship between Trillium seeds and ants. Ant-mediated seed dispersal plays an important role in the movement and establishment of these plants within forest communities, and Professor Ohara’s work has contributed to a deeper understanding of this ecological relationship. Through decades of careful field research, Professor Ohara has sought to uncover the hidden lives of plants that many people know primarily for their beautiful spring flowers. His work demonstrates how long-term observation can transform our understanding of a familiar woodland plant, revealing its complex life history, evolutionary history, and ecological relationships.