North Korea has said it will launch a communications satellite over northern Japan between April 4 and 8, and the report said the 15-strong Iranian delegation had been in the country since the beginning of this month.
It includes senior officials with Iranian rocket and satellite producer Shahid Hemmat Industrial Group, the daily said, quoting unnamed sources.
The Iranians brought a letter from their President Mahmoud Ahmadinejad to North Korean leader Kim Jong-Il stressing the importance of cooperating on space technology, it added.
The United States and its Asian allies suspect North Korea is using the launch as a cover for a long-range missile test.
North Korea and Iran have both come under international pressure over their nuclear activities and are reported to maintain close ties on missile technology.
