QDateTime::toUTC().toTime_t() returns seconds from epoch to local time not to UTC

QDateTime ja = QDateTime::currentDateTime(); // local time (Japan)
qDebug() << "Local time :" << ja.toMSecsSinceEpoch() / 1000 << "\t" << ja.toString("ddd MMM d hh:mm:ss yyyy");

QDateTime empty;
// This, according to documentation should be UTC but is the same as above.
qDebug() << "UTC time   :" << ja.toUTC().toTime_t() << "\t" << empty.fromTime_t(ja.toUTC().toTime_t()).toString("ddd MMM d hh:mm:ss yyyy");

// Using time.h
time_t local;
time_t utc;
memset(&local, 0, sizeof(time_t));
memset(&utc, 0, sizeof(time_t));
struct tm *putc = 0;
struct tm *plocal = 0;

time(&local);
plocal = localtime(&local);
printf("Local time : %ld \t %s", local, asctime(plocal));

time(&utc);
putc = gmtime(&utc);
printf("UTC time   : %d \t %s", mktime(putc), asctime(putc));