The following conclusions come from the investigations on the conflagration which devoured the ranges of hills a little south of the city of Hukuoka, May 2nd to 3rd, 1941. Most of the hills were covered with pine trees (Pinus densiflora sieb. & Zucc., Pinus Thunbergii Porl.), and some were reforested by other coniferous trees (Cryptomeria japonica D. Don, Chamaecyparis obtusa Sieb. & Zucc.), with some scattering capses.