Sango Yokomizo was originally the head inspector of the Saitama district, though he transferred to the Shizuoka district soon after. However, he and his twin brother Jugo, who is also a police inspector and has remained in Saitama, stay in touch and have even assisted each other in various (and even locally unrelated) cases.
As children, Sango and Jugo would often play with other kids near the beach. Both brothers were actually afraid of swimming in the ocean, but while Jugo would go near the water, Sango was so scared that he would never even leave the boat.[1] Thus, Sango, even as an adult, does not know how to swim.[2]
Conan often runs into Yokomizo when he is away for a festival, or on a vacation. It is hinted that Sango is the head inspector of a richer town, as he often is involved in a case at a fancy hotel, or one of Sonoko Suzuki's vacation spots, as well as the homes of her relatives.[3] He is also the head inspector in most cases involving a famous actor or actress,[4] and at many festivals.[5]