3-5 July 1938
Around Kobe City
Heavy Rain, Land Slides, Debris Flows
Death Toll: 695
This is the time just before the Second Wold War. We still did not have enough science and technologies.
Source(Sorry, in Japanese):
http://ci.nii.ac.jp/els/110003967086.pdf?id=ART0005440066&type=pdf&lang=jp&host=cinii&order_no=&ppv_type=0&lang_sw=&no=1467539497&cp=