Rubuta ci gaba don wannan sakin layi - A lokacin, Mitsubishi yana aiki don tallata injin daban, Ha-42 (mai siyar da silinda 18 na Kasei), wanda aka fifita ci gabansa sama da na Ha-43, yana jinkirta kammalawa. Sakamakon haka, Ha-45 ya fara aiki da farko, kodayake yana fama da matsalolin aminci, wanda kuma zai dame Ha-43. Yawancin jiragen sama masu yawa, irin su Kyushu J7W interceptor da kuma Mitsubishi na A7M "Reppu" na Mitsubishi, an shirya su yi amfani da Ha-43, amma a ƙarshe, irin wannan jirgin sama bai ga sabis ba kafin Japan ta mika wuya
, ko kuma injin kanta.