“…The Nemuro Group is forearc deposits of the magmatic arc, and therefore, it is natural that the Jurassic to the Late Cretaceous age peaks of detrital zircons were also sourced from the local magmatic region. In most areas in the East Asia regions such as Sakhalin (Zhao et al., 2017b), Sikhote‐Alin (Nadanhada Terrane; Zhou et al., 2014), South Korean (Choi et al., 2016), North Korean (Choi et al., 2016), Kamchatka (Sredinny Massif; Bindeman et al., 2002), SW Japan (Aoki et al., 2012), and NE Japan (Ishizaka et al., 2021), predominant zircon ages range from the Early Jurassic to the Late Cretaceous (Figure 10). Thus, this period is characterized by intense magmatic activity as well as metamorphism.…”