The Japanese didn't show much quarter to civilians, either...read about Nanking or ask a Korean "comfort girl".
Having said that, it was not so much the fault of the traditional Japanese warrior caste that had in fact, largely been marginalized in the mid-nineteenth century, but rather, it was the modern, industrialized, western-influenced Japanese Army that largely committed the civilian atrocities.
Granted, but Kamikazis specifically targeted military assets.
The Japanese certainly did not scruple at war crimes, if they had killed anything like the number of European civilians as they did Asians, there would have been a tribunal that would have made Nurenburg look like a traffic court.