[en] Dosimeters using a phosphor have widely been used, and their material forms have been mainly single crystal, glass, and opaque ceramics. On the other hand, the authors are developing transparent ceramics as a highly sensitive phosphor material for the next generation dosimeters. To date, they have developed several transparent ceramics photostimulated fluorescence, thermofluorescence, and radiophotoluminescence materials, and have revealed that these materials have really high dosimeter characteristics. This paper reports parts of the results. (A.O.)