Best time to call
New York is 13 hours behind Tokyo. Here are the call windows that respect both your day in Tokyo (Japan) and theirs in New York (United States), plus the daylight saving and holiday traps to watch.
9 AM Tokyo
= 8 PM New York
9 AM in Tokyo = 8 PM in New York, comfortable for you but outside their working day, so agree it in advance.
10 AM Tokyo
= 9 PM New York
10 AM in Tokyo = 9 PM in New York, comfortable for you but outside their working day, so agree it in advance.
11 AM Tokyo
= 10 PM New York
11 AM in Tokyo = 10 PM in New York, comfortable for you but outside their working day, so agree it in advance.
Watch out for these
Both cities are loaded with Tokyo as the anchor. Adjust the day or hours to see the overlap shift, including around daylight saving transitions.
Sorted by participants in business hours
Green = inside 9:00–17:00
New York is 13 hours behind Tokyo. From your desk in Tokyo, that means your afternoon is still their morning, and the window where both teams are at their desks is narrower than it looks. The cleanest single slot is 9 AM your time, which lands at 8 PM in New York.
With a gap this wide, there is almost no natural overlap between a 9-to-5 in Tokyo and a 9-to-5 in New York. One side has to stretch. The honest move is to decide in advance whose comfort you are trading away, then rotate it so the same team is not always taking the early or late call. Do not pretend a painless slot exists; it usually does not at this distance.
The recommended slots above are computed against today's offset, which is the safe default. The trap is the twice-a-year daylight saving changeover: Tokyo and New York do not necessarily move their clocks on the same weekend, so for a few weeks each spring and autumn the gap can shift by an hour and every recurring invite quietly misfires. If your call is near a transition date, confirm the exact wall-clock time on both ends rather than trusting the difference.
On these dates both Japan and United States are likely off, so do not schedule.