Our main subject is the development of novel molecule-based materials with promising electronic and photoelectronic properties for organic and molecular electronics. The research is based on the elucidation of the relationship between molecular structures and physical properties to control and improve the functions. We conduct integrated research: molecular design/synthesis, physical/chemical properties, and application of these organic semiconductors to electronic devices such as organic field-effect transistor (OFET), organic solar cells (OSC), and single-molecule electronics.