Japanese Emperor Naruhito pays his respect to the coffin of Britain's Queen Elizabeth, following her death, during her lying-in-state at Westminster Hall, in London on Sept 18, 2022. (SARAH MEYSSONNIER / POOL VIA AP)

TOKYO - Japanese Emperor Naruhito is set to take a magnetic resonance imaging (MRI) test in early November to check there is no disease in his prostate, the Imperial Household Agency (IHA) said in a statement on Monday.

Naruhito, 62, will take the MRI test after the result from a separate prostate-specific antigen (PSA) test showed values that were on a "somewhat concerning" trend, the agency said, without giving further details.

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Naruhito last month attended the funeral of Britain's Queen Elizabeth together with Empress Masako in his first overseas trip since acceding to the throne in May 2019.