An unofficial translation by C. Douglas Lummis of excerpts from Chapter 5 of Henoko ni kichi wa tsukurenai (A Base Cannot Be Built at Henoko) by Yamashiro Hiroji and Kitaueda Tsuyoshi (Iwanami Booklet No. 987, 2018). Comments and words added by the translator are placed in square brackets. Three dots indicate sections left out. The purpose of translating just this section is to show that the engineering difficulties faced by the Henoko base project are not the inventions/exaggerations of anti-base activists, but are based on hard scientific data. The data concerning the probable earthquake fault is the result of research carried out by seismologists; the data indicating height limit violations comes from the Okinawa Defense Bureau and has been supported by surveys carried out by skilled surveyors; the tests that produced the N-zero result for part of the sea bottom were also carried out by the Defense Bureau. CDL