A few years ago, a local rabbi gave a talk at our community college, about how his parents were among those who were given visas by Sugihara and were able to escape the Nazis.
Also, there is a very beautifully illustrated children's book ("Passage to Freedom: The Sugihara Story," by Ken Mochizuki, illustrated by Dom Lee) on Sugihara. I once bought a copy for a Japanese friend who had heard of Sugihara but did not know the details of his accomplishments.
It's sad that Sugihara's career was ruined as a result of his actions and he was treated as something of a pariah by the Japanese government until quite late in his life.
Here's a link to the children's book, which you might enjoy reading (and looking at the drawings):