Yoji Kondo (近藤 陽次, Kondō Yōji, May 26, 1933 – October 9, 2017) was a Japanese-born American astrophysicist who also wrote science fiction under the pseudonym Eric Kotani. He edited Requiem: New Collected Works by Robert A. Heinlein and Tributes to the Grand Master (1992), and contributed to New Destinies, Vol. VI/Winter 1988—Robert A. Heinlein Memorial Issue (1988), after his friend, writer Robert A. Heinlein, died in 1988.Kondo also edited the non-fiction book Interstellar Travel & Multi-Generational Space Ships, part of the Apogee Books Space Series. Kondo was also an accomplished teacher of Shodokan Aikido and judo. Source: Wikipedia (en)