His grandfather, Honkyo TANI, was originally a lower-ranked government official, but he became known as a statesman because he excelled in business, and he achieved superior performance, handpicked by the Tayasu family.
祖父の谷本教ははじめ下役人であったが経済的手腕に優れていたため立身し民政家として聞こえ、田安家に抜擢され治績を残した。