Complex sentence: One of Ichirō's grandsons, Yukio Hatoyama, became Prime Minister-designate in 2009 as a member of the DPJ; but he will confront challenges which are much different than those his father and grandfather faced when they were in government.
Split into simpler sentences: One of Ichirō's grandsons, Yukio Hatoyama, became Prime Minister-designate in 2009 as a member of the DPJ. He will confront challenges which are much different than those his father and grandfather faced when they were in government.