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American on trial for dumping Tokyo woman’s body refuses comment

Gregory Gumo
Gregory Gumo

YOKOHAMA (TR) – An American male on trial for allegedly dumping a woman’s body in July in Kanagawa Prefecture refused to offer comment on the charges as his trial opened on Friday at the Yokohama District Court, reports NHK (Oct. 30).

Gregory Gumo, a 41-year-old marketer and promoter in the entertainment industry, remained silent on allegations that he tied the body of Mariko Akitaya, a 42-year-old resident of Tokyo’s Meguro Ward, to an anchor and dumped her in Koajiro Bay. His lawyer also refused to offer comment.

On the morning of July 29, the body of Akitaya, a contract employee in the cosmetics industry, was found wrapped in a brown plastic sheet and floating about 20 meters off the coast.

According to prosecutors, Akitaya and Gumo, a resident of Yokohama’s Hodogaya Ward, met one another at Yokohama Station just prior to the incident and traveled by car to the border of Shizuoka and Kanagawa prefectures.

During this period, prosecutors say, Akitaya died. Gumo then attached her corpse to a towing rope that was anchored with a concrete block. He then used a canoe to toss her body and the ballast into the bay.

On August 6, police first arrested Gumo for abandoning the body of Akitaya.

The corpse exhibited no signs of external injuries. The approximate time of death was July 28.

On the same day Akitaya’s body was found, Gumo was stopped by police as he attempted to travel to the United States on an international flight from Haneda Airport.

Later in August, Gumo was arrested for the murder of Akitaya. However, the prosecutor’s office has delayed prosecution on that charge due to the need for further investigation.


  1. vp vp November 9, 2015

    Correct me if I’m wrong, but neither “refused” to comment. They “declined” to comment, as long as they were not legally required to do so by law. Since there is no mention of charges of contempt I believe the article has used the wrong term, either accidentally or sensationally. Feel free to contact me if you need a capable English editor.

  2. yaesukita yaesukita March 1, 2016

    Correct me too if I’m wrong but initial reports said she had water in her lungs, which indicated that she was alive and still breathing when her bundled up “living” body was dumped into the bay. As such the charge is technically wrong. Gumo could not have “wrongfully disposed of her corpse” but rather dropping a living person into the water like that is “murder.” Either he did it or he didn’t do it but in any case it was clearly murder.

    • Staff Report Staff Report Post author | March 1, 2016

      The prosecution appears to have concocted an explanation to cover for a lack of confession.

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