In 1990, after almost fifteen years as a Unit Master at the AA, Tom Heneghan went on sabbatical to Japan where he remained for more than a decade. This lecture looks at the major works of his Japan times, produced in his Tokyo-based office, The Architecture Factory. Heneghan first went to Japan after being invited by Arata Isozaki to participate in Art Polis, a large architectural programme in Kumamoto. This project won him the Gakkai Shoh - the principal award of the Architectural Institute of Japan - and since then he has worked on many types of projects varying in scale from museums and bridges to a conceptual masterplan for a new capital city of Japan. In 1992 he was appointed master architect of the Toyama Machi no Kao programme, which included buildings by fellow AA tutors Ron Herron, Carlos Villanueva Brandt, Peter Salter, and Daniel Libeskind. Other projects include the Forest Park of Adatara. Tom Heneghan studied at the AA, he has exhibited and lectured internationally, and is now Professor of Architecture at the University of Sydney.