This volume is the proceedings of the 12th Mathematical Society of Japan, Seasonal Institute (MSJ-SI) 'Stochastic Analysis, Random Fields and Integrable Probability,' which was held at Kyushu University in Fukuoka, Japan from July 31 to August 9, 2019.This volume consists of 18 peer-reviewed articles written by speakers who lead currently active research fields of probability theory such as stochastic analysis, integrable probability, random fields and discrete probability.The editors believe that this volume is quite useful for all researchers and students who are interested in these fruitful research fields.Published by Mathematical Society of Japan and distributed by World Scientific Publishing Co. for all markets except North America