Original: Three more extensions are planned for opening by 2010: Hakata-Yatsushiro, Hachinohe-Aomori, and by 2014: Nagano-Kanazawa, and 2015: Aomori-Hakodate (through the Seikan Tunnel).
Simplified: Three more extensions are planned for opening by 2013: Hakata-Yatsushiro, Nagano-Kanazawa, and Hachinohe-Aomori.