15th Topical Workshop on Heterostructure Microelectronics (TWHM 2024). The workshop will be conducted entirely through face-to-face presentations. This biannual workshop has been held in Japan since 1994 and has provided valuable opportunities for discussion and communication between researchers and related members in the society of heterostructure microelectronics. TWHM covers various aspects of electron devices based on semiconductor heterostructures, including material characterization, device physics, process technology, circuit design, and system applications.