The Path Towards KamLAND2-Zen, a Next-Generation 0νββ Experiment

The KamLAND-Zen experiment, located in Kamioka Observatory, Japan, is a radiopure liquid scintillator detector that uses 745 kg of enriched Xenon gas (~91% of ¹³⁶Xe) to search for neutrinoless double beta decay. It currently provides the most stringent limit on the effective Majorana neutrino mass. Following roughly 22 years of data-taking, the experiment stopped its data acquisition in August 2024 to prepare for a major upgrade, known as KamLAND2-Zen. A brief overview of the KamLAND-Zen experiment and results will be given, along with an outline of the developments and prospects for the KamLAND2-Zen upgrade which aims for a half-life limit beyond 10²⁷ years.