I am a graduate researcher at Keio University School of Medicine, focusing on gut microbiota–derived metabolites and their roles in intestinal homeostasis. My research centers on phenyl propionic acid (PPA), a microbial metabolite that enhances colonization resistance against pathogens through metabolic modulation rather than direct toxicity. By integrating gnotobiotic mouse models, molecular biology, and LC–MS–based metabolomics, I aim to uncover how microbiota-derived metabolites regulate host–microbe interactions. Ultimately, I seek to translate these findings into strategies for disease prevention and precision nutrition, contributing to a deeper understanding of how diet and microbiota shape human health.