Tokyo time explained
Japan keeps a single time zone nine hours ahead of UTC, with no daylight saving anywhere in the country. Summer time was imposed briefly during the American occupation and abandoned in 1952; proposals to reintroduce it, including one ahead of the 2020 Olympics, have repeatedly failed.
Tokyo does not observe daylight saving. Its offset from UTC is the same all year round, which makes scheduling with it noticeably simpler.
Reaching Tokyo
A Tokyo morning reaches Sydney and Singapore comfortably, while Europe only opens as the Tokyo working day is ending. Calls to the US west coast usually land in the Tokyo morning, one calendar day behind.
How this page works
The time above is calculated on your own device from the IANA time zone
database that ships with your browser, using the zone
Asia/Tokyo. Nothing is fetched from a server, and the offset
shown is whatever is currently in force rather than a
number typed into the page — so when a country changes its rules, this
page changes with it.
The difference from your own clock is worked out the same way, comparing Tokyo's current offset against your device's. If your computer's clock is wrong, so is that comparison.