We are developing X-ray SOIPIXs (Silicon-On-Insulator pixel detector) for the focal plane imagers of a future Japan-lead X-ray observatory FORCE (Focusing On Relativistic universe and Cosmic Evolution), aiming at broadband (1-80 keV) imaging spectroscopy with high angular resolution (<15”). The X-ray SOIPIXs have an event trigger output function implemented in each pixel that offers microsecond time resolution and enables reduction of the non-X-ray background that dominates the high X-ray energy band above 5–10 keV. The thick depletion layers with back illumination offers wide band coverage of 1–40 keV. In the seminar, we will report on the recent progress in the X-ray SOIPIXs development and the introduction of the FORCE mission.