Iyiphi inkampani eyakha umkhumbi-ngwenya waseJapane i-Yu 12?
Context:I-Yu 12 kwakuyi-submarine ye-Imperial Japanese Army yokuthutha ye-Yu 1 subclass yohlobo lwe-Yu I. Yakhelwe ukusetshenziswa phakathi nezigaba zokugcina zeMpi Yezwe II, yasebenza emanzini eziqhingi zaseJapane.  Ukwakhiwa Eminyakeni emibili yokugcina yeMpi Yezwe II, i-Imperial Japanese Army yakha imikhumbi-ngwenya yokuthutha <unk> ngokusemthethweni imoto yokuthutha engaphansi kwamanzi yohlobo 3 futhi eyaziwa yi-Japanese Army njengeMaru Yu <unk> eyayizothutha ngayo iziqhingi zayo ezihlukanisiwe eziqhingini zasePacific. Kwakungawo kuphela ama-submarine ohlobo lwe-Yu I aqedwa futhi asebenza. Uhlobo lwe-Yu I lwakhiqizwa ngezigaba ezine, ngayinye ekhiqizwa ngumkhiqizi ohlukile futhi ehluke ngokuyinhloko ekwakhiweni kwemibhoshongo yabo yokulawula nemininingwane yezibhamu zabo. Ayikho eyayiphethe ama-torpedo noma eyayine-torpedo tubes. I-Yu 12 yayiyiyunithi ye-Yu 1 subclass.  IHitachi Kasado Works (Hitachi Kasado Seisakujo) e-Kudamatsu, eJapane, yakha i-Yu 12. Imibhalo yemininingwane yokwakhiwa kwe-Yu 12 ayitholakalanga, kodwa imikhumbi-ngwenya yangaphambilini yohlobo lwe-Yu I yabekwa futhi yethulwa phakathi nengxenye yokugcina ka-1943 futhi yangena enkonzweni ekupheleni kuka-1943 noma ekuqaleni kuka-1944.
Inkampani eyakha umkhumbi-ngwenya waseJapane i-Yu 12 kwakuyiHitachi Kasado Works.