Berbeda dari Tiongkok, yang mengelola keputren Kaisar Jepang adalah biti-biti, bukan [[orang kasim|sida-sida]], dan biti-biti dapat saja mengemban jabatan-jabatan tinggi dalam badan pengurus rumah tangga kekaisaran.<ref name=" Rowley date? page?"/>
Biti-biti terbagi menjadi dua golongan, dan masing-masing golongan terbagi lagi menjadi beberapa jenjang jabatan sesuai dengan tugas yang diembannya.<ref name="Lebra date? page?">{{harvnb|Lebra|p=}}</ref><!--TheGolongan firstpertama classberanggotakan consistedpara of the {{transl|ja|''nyokan}}'', oryakni ladiespara perwara pengemban jabatan-in-waitingjabatan whomajelis heldistana, courtyaitu offices: {{transl|ja|''naishi-kami}}'' ({{transl|ja|''shoji}}''), {{transl|ja|''naishi-suke}}'' ({{transl|ja|''tenji}}''), anddan {{transl|ja|''naishi-no-jo}}'' ({{transl|ja|''shoji}}''). The second class were the female palace attendants: {{transl|ja|myobu}}, {{transl|ja|osashi}}, {{transl|ja|osue}} and {{transl|ja|nyoju}}.<ref name="Lebra date? page?" /><!-- The ladies-in-waiting worked as personal assistants, tending to the Emperor's wardrobe, assisting the emperor's baths, serving meals, performing and attending court rituals.<ref name="Rowley date? page?" /> Ladies-in-waiting could be appointed as concubines, consorts or even Empresses by the Emperor or the heir to the throne.<ref name="Rowley date? page?" /> The function of a lady-in-waiting as potential concubine was abolished in 1924.<ref name="Rowley date? page?" />
