What is it? Four golds on offer including a first for women.
What do I need to know? It's not just about distance – marks are awarded for style and technique, although usually the longest jumper wins.
Tell me something I don't know The IOC resisted for 16 years before allowing women to jump, claiming there were not enough top-level athletes.
GB chances No qualifiers.
One to watch Sara Takanashi, the 17-year-old from Japan, is favourite to win the first female gold.
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