Age: 10<br /> Birth Place: Harima Province<br /> Class: Year 1, Class Ha<br /> Committee: Biology Committee<br /> <br /> A bright and friendly boy who almost always has a smile on his face. His father is a yamabushi and training with him in the mountains has made Sanjirou quite perceptive as well as a fast runner. Among his classmates only Rantarou is faster, and because of it they have an ongoing friendly rivalry.<br /> <br /> Like his roommate Heidayuu he's fond of traps, and their room is full of traps and devices they've set up.<br /><br />
