CiON, a unit consisting of two vocalists and three instrumentalists, is set to perform at Billboard Live for the first time in two years. CiON, who advocate a unique “brass × idol” concept as their activity style, and whose performances that blend singing, playing, and dancing have won broad support, made their major debut with Avex in April 2025 and are increasingly active across a wider range of fields. This fourth edition of 【JAZZ SESCiON】 is a special project led by a powerful band lineup including music supervisor Goshi Nishizaki, weaving an ensemble that offers a flavor different from their usual stage. CiON, continuing to make steady progress, will deliver an exquisite musical experience—please don’t miss it.