CiON, a unit consisting of two vocalists and three instrumentalists, will return to Billboard Live for the first time in two years. With their unique “brass × idol” concept as their activity style, their performances that combine singing, playing, and dancing have drawn strong support. CiON made their major debut with avex in April 2025 and are increasingly active across a broader field. The fourth installment of 【JAZZ SESCiON】 is a special project that, backed by a powerful band lineup including music supervisor Goushi Nishizaki, weaves an ensemble that offers a different flavor from their usual stage. CiON, steadily stepping up, will deliver an exquisite musical experience—be sure not to miss it.