In Japan, the aide-de-camp to the Emperor /侍従武官, jiju bukan/ is a special military official whose primary duties are to report military affairs to the Emperor and act as a close attendant (chamberlain). From 1896 through to 1945, a small number of army and naval aides-de-camp were supplied to the Emperor due to his increased status and the risks to him during wartime.
An excerpt from the 1896 Imperial Edict No.113 /明治29年勅令第113号):Aides-de-camp to the Emperor will perform attendant duties and will relay to him military matters and orders, be present at military reviews [in his name] and accompanying him to formal ceremonies and interviews.
「侍従武官ハ天皇ニ常侍奉仕シ軍事ニ関スル奏上奉答及命令ノ伝達ニ任シ観兵演習行幸其他祭儀礼典宴会謁見等ニ陪侍扈従ス」
Aide-de-camp badge.
Aide-de-camp Badge /侍從武官徽章 - lit. Attendant Military Officer's Badge/ was established by Imperial Edict No. 5 /勅令第五號/ on February 14, 1901 (it was published in Official Gazette on February 15, 1901 /明治三十四年二月十五日官報/.
Original Imperial Edict No. 5.
Badge was made in silver (chrysanthemum and metal elements of the banners were gilded) and worn on the right chest under the breast pocket /侍從武官徽章ハ制服衣ノ右胸部乳下二裝著ス/
Imperial Edict No. 5 published in Official Gazette on February 15, 1901.