Question: When was the writer of Hyperspace born?

Context paragraphs:
Hyperspace (book): Hyperspace: A Scientific Odyssey Through Parallel Universes, Time Warps, and the 10th Dimension (1994, ISBN  ) is a book by Michio Kaku, a theoretical physicist from the City College of New York.  It focuses on Kaku's studies of higher dimensions referred to as hyperspace.  The recurring theme of the book is that all four forces of the universe (the strong force, the weak force, electromagnetism and gravity) become more coherent and their description simpler in higher dimensions.

Michio Kaku: Michio Kaku ( ; born on January 24, 1947 in San Jose, California) is a Japanese American theoretical physicist, futurist, and popularizer of science.  He is professor of theoretical physics at the City College of New York and CUNY Graduate Center.  Kaku has written several books about physics and related topics, has made frequent appearances on radio, television, and film, and writes online blogs and articles.  He has written three "New York Times" best sellers: "Physics of the Impossible" (2008), "Physics of the Future" (2011), and "The Future of the Mind" (2014).

Supporting paragraphs: Hyperspace (book) Michio Kaku
Answer: born on January 24, 1947