Conductor Ilan Volkov posted this memory on FB -
"I worked as assistant with Boston Symphony between 1998-2001.The last few years of Seijo Ozawa's time there.I learnt tons and witnessed many many rehearsals and concerts.I still remember how he came to a first rehearsal of Peter Lieberson piano concerto(Peter Serkin soloist) and knew it by heart(I think he just learnt it a few hours before,used his famous photographic memory).And did fantastic rehearsals and concerts.Just one example out of many unforgettable concerts(especially impressive were performances of Takemitsu, Lutoslawski,Dutilleux and Messaien).
RIP Seiji Ozawa"