Must-see for hot spring lovers! This is a problem set with over 200 practice questions and detailed explanations, designed to help you prepare for the popular "Onsen Sommelier Certification Exam." It covers a wide range of topics, from the basics of hot springs to spring quality, medicinal properties, how to read an onsen analysis sheet, bathing methods, hot spring etiquette, the geography of major hot springs in Japan, and the history and laws related to hot springs. Please use it to study for the exam.