Tokyo is 9 hours ahead of London during GMT (winter), and 8 hours ahead during BST (summer). When it's 9:00 AM in London, it's 6:00 PM in Tokyo. Japan does not observe DST.
The time difference shifts by 1 hour when London switches between GMT and BST while Tokyo stays on JST year-round.
Late afternoon Tokyo works! 5:00 PM - 7:00 PM Tokyo corresponds to 8:00 AM - 10:00 AM London (winter). Tokyo evening catches London morning.
Tokyo and London are two of the world's largest financial centers with significant trading hour overlap. British Airways and JAL operate direct flights connecting these global hubs.