Dr Frans de Waal posted this nice tribute to Dr. Nishida today on his facebook page
"Very sad news. Yesterday my Japanese friend Toshisada Nishida died at the age of... 70. He was one of the absolute greats of our field, having started his field work on chimpanzees in the mid 60s, and stimulating primatology for many decades. In the last few years he struggled with cancer, in vain. May he rest in peace."