Nadal faces Nishikori in the bronze medal match of the men's singles tennis event on 14 August.
New Zealand star suffered the injury during a shock 14-12 Pool C defeat to Japan on Tuesday.
During both ceremonies, Shinzo Abe pledged his determination to work toward a world free of nuclear arms.
Can a modern democracy function with a centenarian head of state?
The release of Nintendo's popular Pokemon Go game has made the character more popular.
The 21-year-old demonstrated his ability with a goal for Japan in their Olympic opener against Nigeria.
Olympic gymnastics champion Kohei Uchimura played Pokémon Go without a set data-roaming plan.
Tokyo's new governor faces tough challenge in kerbing spend on the 2020 Tokyo Games.
Japanese fishermen knew about the whale which was unknown to science.
Indonesian firm Dompet Dhuafa was also honoured for 'expanding the transformative impact of religious tax in Islam'.
Man arrested on suspicion of murder reportedly a former employee at the Sagamihara care facility outside Tokyo.
The monarch who has been emperor for 27 years has suffered from ill health in recent times.
The US, Japan and Australia ask China to abide by the landmark ruling that favours the Philippines.
Abe's ruling coalition secures two thirds majority in the upper house of parliament.
Japan denies incident posed any threat as claimed by China.
Official says Japan could change agreement that protects US military personnel from certain crimes.
Asano will join the Gunners after completing his medicals.
Takuma Asano has already confirmed approach from Arsenal.
The North Korean foreign ministry calls the drill 'another military provocation perpetrated by the US'.
The new bill recognises a child's right to grow up in a family setting.
Japan Meteorological Agency issues warnings of further rain and thunderstorm on 22 June.
The handover of 15.6 square miles of jungle would be the largest return of land since 1972.