"There are a few we have not yet been able to contact due to communications difficulties.
"At this stage there are no reports of New Zealand casualties as a result of the earthquake or tsunami."
About 3500 New Zealanders were registered with Japanese authorities as living in Japan and it was likely at least a further 3000 New Zealanders were visiting the country, the spokesman said.
"New Zealanders with concerns about family in Japan should try to contact them directly in the first instance," he said.
Anyone who could not make contact with people known to be in the northeast should contact MFAT on 0800 432 111 or, if calling from overseas, on +64 4 439 8000.
New Zealanders in Japan were asked to register their details on
www.safetravel.govt.nz
.
The quake sparked widespread tsunami warnings, from Hawaii to New Zealand and the spokesman said MFAT staff in Wellington and at Pacific posts had monitored the situation closely overnight.
"To date there have been no reports of major damage. Many Pacific countries have now cancelled or downgraded their Tsunami warnings," he said.
Mr Kennedy, in Tokyo, described the quake as "pretty hair-raising".
"It seemed to be going down and then it started a rocking motion, which was very unnerving," he told Radio New Zealand.
"It must have been horrific for the people closer to the epicentre."
View Quake, tsunami wreak havoc in Japan in a larger map
- NZPA