What time is it in London when it's noon in Tokyo?

When it's 12:00 PM in Tokyo, it's 3:00 AM in London.

How many hours apart are Tokyo and London?

Tokyo and London are separated by the current UTC-offset difference between their time zones, adjusted for daylight saving time on each side.

Tokyo uses Asia/Tokyo (the IANA time zone database identifier).

City time converter

Convert the current time in Tokyo, Japan to London, UK. Daylight-saving adjustments applied automatically.

Common times in Tokyo and their equivalents in London:

Table computed using a fixed reference date for stability. Use the full converter for any date and time.

Country: Japan
Zone: Asia/Tokyo

Country: UK
Zone: Europe/London

What time is it in London when it's noon in Tokyo?: When it's 12:00 PM in Tokyo, it's 3:00 AM in London.
How many hours apart are Tokyo and London?: Tokyo and London are separated by the current UTC-offset difference between their time zones, adjusted for daylight saving time on each side.
What time zone does Tokyo use?: Tokyo uses Asia/Tokyo (the IANA time zone database identifier).