1. Architectural Institute of Japan (AIJ). (2011). Preliminary Reconnaissance Report of the 2011 Tohoku-Chiho Taiheiyo-Oki Earthquake Maruzen Tokyo Japan (in Japanese).
2. Port and Airport Research Institute. (2011). Damage Assessment of Ports in Tohoku Region (Preliminary field survey report). Attachment 2: Reconnaissance results of respective ports (March 23 2011).
3. The 2011 Tohoku Earthquake Tsunami Joint Survey Group. (2011). The 2011 off the Pacific Coast of Tohoku Earthquake Tsunami Information (May 20 2011).