War Of The Insects (1968)

aka’s: Konchu Daisenso/Genocide/
昆虫大戦争

All the insects on Earth become wild and attack humans, causing Armageddon. Stars Keisuke Sonoi, Yűsuke Kawazu and Emi Shindô. Also with Kathy Horan and Chico Lourant. (In Japanese language with no subtitles).