actually , i think the motto "kenteki hissatsu" / 見 敵 必 殺 / See Enemies - Immediately Kill Them , has existed in the japanese army long before 2013 , at least since World War 2 , or maybe even older .
the page below is from the manga Esper Mami by Fujiko F Fujio . the old man is a veteran of World War 2 , he was hiding in a jungle for decades , when he comes out , he sees a girl with dyed red hair and he thinks she is an American , so he tries to kill her while yelling " 見 敵 必 殺 " , lol .
https://----[! URL is only accessible to you. !]----/-MWmBkiguMproh8eIus5e6g315s833BgnjArEYYAqB7FGDoC62st29ObncxV3-3g4n6nUbDiIsZQBXXANoXF-5yMblbVr5ESxqNH-J_xHepl87uwOV4Q0edzTJuc8fgF9UMoJyLTtZ0ub51TOWeSDNNz03lU2Kx_tsujhKEbM3W7Yr-5kY5RC7UmjBFXeFSbBw4IDBXe2GJ70GxhHj0_rhJfc45WxXLxWs3fS4R10bWMMnX-M78RGi3_yjtpD3Zazfym3GgZUcEbUIaOdGnZejHXlYWeEgy9AClEYMWJRLDuzPGWAsdeso4ogT1yT_EUYk0mN9G-vmWHoFaF2ZXxd9FLN2rDzthRkFxV2dVaKBJ16iS-isH5bR3U7NrJiTg_0yZIyWnXjyI6zOd6FfbplciKuIXZoUnUIhzTBf-dmhzPm9CUdZkJXP_NJthkn_D7ElV65z6ZiEEGaXAltreI1LsAHfcHMhTmZUJ6J2Y63Odq8eRbPQI0e32wassTPKH-exymeB_kKCOnp4qJUjmfjpwfzHDHO1ntgm19QIOfx7nISHVAV6SHxEJVBA-kAwLTBTCmEgLDDS4Tg-pv9rRoAA1B5Ffa2iGkfJRliSxE0EcxyjD9sJcYQSyLwhx9hJFUou3Wa0UdEoLwkgGOOKu-3pxXIu0Vm-rfbmCXP74bT2f-hQcW8j-wyvzLpuZnBA=w584-h876-no