, which oversees the JET program, said the organization was unable to contact one of its teachers as of Friday night. The official added, however, that this person was headed for Cambodia and was unlikely to have been affected by the temblor or the massive tsunamis that ensued.

A spokesman for Nova said that of its roughly 6,300 non-Japanese employees nationwide, the whereabouts of 40 who may have been in the tsunami-hit region were still unknown.

"But we have yet to receive information that any of our employees have died or have been injured," he added.

After a holiday break, classes at Nova began Wednesday in eastern Japan and Thursday in western Japan.