As his Miyake Hontei (main residence) in Shiba Takanawa, Tokyo (Minato Ward, Tokyo) was not destroyed in air raids, he sold a part of the land, established a sawing machine company called Takeda Amiki, and started business, but failed.
東京都芝(東京都港区)高輪の宮家本邸が空襲に遭わなかったため、土地の一部を売却して竹田編機という編物機械会社を設立し、事業に着手するが、失敗。