In 1940, he wrote a script of "Tsuma no baai: zen-ko-hen" (My wife's case: Part 1, Part 2) (a talking picture, Toho Cinemas Co.); however, his later works and activities had been unknown since then.
東坊城は1940年、佐藤武監督、吉屋信子原作妹の主演作『妻の場合前・後篇』（トーキー、東宝映画）の脚本を書いたが、同作を最後にその後の活動は不詳。