Debate over the final section between Isahaya and Nagasaki continued for several years, before construction was finally approved by the government in December 2011.
Debat mengenai bagian terakhir antara Isahaya dan Nagasaki terus berlanjut pada beberaoa tahun terakhir, sebelum rencana akhirnya disetujui pemerintah pada bulan Desember 2011.