Taskinen won further Finnish 800 m titles in 1975, 1976 and 1978; counting indoor titles (one each at 400 m and 800 m) and relay titles (one at 4 × 400 m and two at 4 × 800 m), he is an 11-time Finnish champion. At the 1978 European Indoor Championships in Milan he won gold in the 800 metres, ahead of East Germany's Olaf Beyer; , his winning time of 1:47.36 still remains the Finnish indoor record, though Wilson Kirwa and Ari Suhonen have run faster on oversized tracks. At the 1978 European outdoor championships in Prague Taskinen again took part in the 800 metres, but was eliminated in the semi-finals.