Since his retirement he has been visiting professor at various Japanese and French universities. His subject area is Japanese foreign policy, focusing currently on various aspects of Japan鈥揅hina relations, including disputes in the East China Sea, Japan鈥檚 policy towards the South China Sea and the growing Chinese presence in Japan. His book publications include Japan鈥檚 security relations with China since 1989 (Routledge 2002), Japan鈥檚 quest for a permanent Security Council seat. A matter of pride or justice? (Macmillan 1999) and Japan鈥檚 foreign policy in the 1990s. From economic superpower to what power? (Macmillan 1996).