Salt on the wound
April 26 Tokyo Governor Shintaro Ishihara says Japanese troops should be stationed on the disputed Diaoyu Islands in the East China Sea and that Japan should use military force to prevent intrusions by Chinese activists.
May 2 Japanese Prime Minister Junichiro Koizumi urges the European Union not to lift an embargo on arms sales to China.
May 9 Japan announces plans to install a signpost and a heliport on Okinotori, a remote, disputed reef in the Pacific Ocean, to emphasise Tokyo's claim to the area.
May 16 Mr Koizumi says he will make an 'appropriate decision' on future visits to the Yasukuni war shrine, adding 'it is not for another country to interfere'.
May 17 Japan reveals that 18 citizens have registered their residence on the Diaoyu Islands, a further 122 on Okinotori.
May 20 Mr Koizumi says his pilgrimages to the shrine are made 'as an individual'.
May 20 Mr Ishihara lands on one of the Okinotori 'islets'.