Sanctions over Pyongyang's recent nuclear and ballistic missile tests have resulted in Tokyo banning 22 people from re-entering Japan after visiting North Korea, sources said Sunday.

Measures approved last month by Prime Minister Shinzo Abe's government ban the re-entry of senior officials of a pro-Pyongyang group and of Korean engineers living in Japan who are suspected of involvement in nuclear and missile development, they said.

Subject to the sanctions are officials belonging to the pro-Pyongyang General Association of Korean Residents in Japan, more commonly known as Chongryon, including its chairman, Ho Jong Man. Also included are officials of Korean University in Tokyo, the sources said.