According to an inquiry conducted last year into the actual conditions of inappropriate navigation in Tokyo Bay, 525 ships were reported. No major accident has occurred in Tokyo Bay since 1997 when the Panamanian-registered tanker Diamond Grace hit a shallow seabed and spilled crude oil. However, the results of this inquiry clearly demonstrate the reality where fortunately no accident has occurred. Now is the time for all people involved to seriously face the problem areas and how best to plan for navigational safety measures.