This volume contains 18 peer-reviewed papers based on the presentations at the 10th Annual International Workshop on Bioinformatics and Systems Biology (IBSB 2010) held at Kyoto University from July 26 to July 28, 2010. This workshop started in 2001 as an event for doctoral students and young researchers to present and discuss their research results and approaches in bioinformatics and systems biology. It is part of a collaborative educational program involving leading institutions and leaders committed to the following programs:Boston — Graduate Program in Bioinformatics, Boston University Berlin — The International Research Training Group (IRTG) “Genomics and Systems Biology of Molecular Networks”Kyoto — The JSPS International Training Program (ITP) “International Research and Training Program of Bioinformatics and Systems Biology”Tokyo — Global COE Program “Center of Education and Research for Advanced Genome-Based Medicine”