ISBN 978-4-89798-565-7*Seishiro Sugihara & Norman Hu (2001), "Chiune Sugihara and Japan's Foreign Ministry : Between Incompetence and Culpability", University Press of America.
ISBN 978-4-89798-565-7* Seishiro Sugihara & Norman Hu, "Chiune Sugihara and Japan’s Foreign Ministry : Between Incompetence and Culpability", University Press of America, 2001.