His rich knowledge of overseas was organized by Hoshu KATSURAGAWA into the book titled "Hokusa bunryaku" (Stories about Russia Told by a Repatriated Drifter) and encouraged the development of Rangaku.
彼の豊富な海外知識は桂川甫周が『北槎聞略』としてまとめ、蘭学発展のための刺激にもなった。