Abstract
Luminescence dating method, single-aliquot regenerative-dose (SAR) protocol was employed for Toya pyroclastic flows using Red thermoluminescence (Red TL) of quartz grains. Red TL intensities were corrected by test-dose monitoring for sensitivity changes due to repeated heating and X-ray irradiations. The corrected Red TL ages of Toya pyroclastic flows using SAR protocol were well agreed with age estimation deduced from geological correlation.