Qualified japanologist, 1979. Doctor philosophy, 1984.
Academy assistant Humboldt University, Berlin, 1979—1988, Institute International Politics and Economics, Berlin, 1988—1990. Member district executive Partei Demokratischen Sozialismus (PDS), 1990—1991, member executive committee, since 1991, federal vice-chairman, 1993—2000. Member German Bundestag, 1990.
Vice-chairman Confederal Group European United Left/Nordic Green Left. Observer European Parliament, 1991—1994, member. Member Volkskammer of the German Democratic Republic, 1990, Committee Constitutional Affairs.
Substitute Committee Citizens' Freedoms and Rights, Justice and Home Affairs. Member delegation for relations with Japan.