Question: What was the official capacity of the 1964 Summer Olympics stadium at which the Sanistand appeared?

Related documents: [0]  [DOC] National Stadium (国立競技場 , Shin kokuritsu kyōgijō ) was a multi-purpose stadium in Kasumigaoka, Shinjuku, Tokyo, Japan. The stadium served as the main stadium for the opening and closing ceremonies, as well as being the venue for track and field events at the 1964 Summer Olympic Games. The Japan national football team's home matches and major football club cup finals were held at the stadium. The stadium's official capacity was 57,363, but the real capacity was only 48,000 seats. [END] 
[1]  [DOC] Sanistand was a urinal for women manufactured by Japanese toilet maker giant TOTO from 1951 to 1971 and by American Standard from 1950 to 1973. It appeared in a bathroom in the National Stadium for female athletes during the 1964 Summer Olympics in Tokyo. The urinal encouraged women to urinate from a standing position, without the need to sit on a shared seat. [END]  
Answer: 57,363
57,363