"I was so upset to be disqualified in the 100m that I absolutely need to make up for it in the 200m."
She was disqualified for a false start at the 100 metre heat.
Jayasinghe finished her heat in 22.50 seconds, 0.05 behind reigning champion Allyson Felix.
Jayasinghe told state television earlier that she would have loved to wear a suit with a national flag or colours imprinted on it like athletes of other countries but usually had to buy her own off the shelf and make do somehow.
Nine officials accompanied the sprint star to Japan for the current event, media reports said.