The 13th International Conference on Awareness Science and Technology (iCAST 2025) will be hosted by Satya Wacana Christian University, Salatiga, Indonesia. "Awareness" is the ability to be conscious of, feel, or perceive (Wikipedia). This implies vigilance in observation and alertness in drawing inferences from what one experiences (Merriam-Webster). The ultimate goal of awareness computing is to create computing systems that are themselves aware. This conference has evolved from the International Workshop on Aware Computing (IWAC 2009) in Aizu-Wakamatsu, Japan, the International Symposium on Aware Computing (ISAC 2010) in Tainan, Taiwan, the International Conference on Awareness Science and Technology (iCAST 2011) in Dalian, China, iCAST 2012 in Seoul, Korea, iCAST 2013 in Aizu-Wakamatsu, Japan, iCAST 2014 in Paris, France, iCAST 2015 in Qinhuangdao, China, iCAST 2017 in Taichung, Taiwan, iCAST 2018 in Fukuoka, Japan, iCAST 2019 in Morioka, Japan, and iCAST 2023 in Taichung, Taiwan.