The Elize Matsunaga Case

Marcos Kitano Matsunaga, an executive in the Yoki food company, was killed in his São Paulo apartment in May 2012. His wife, Elize Araújo Kitano Matsunaga, admitted causing his death and concealing the body, while disputing aspects of motive and circumstances. A jury convicted her in December 2016 of qualified homicide and concealment. In 2019, the Superior Court of Justice reduced her total sentence after deciding that her confession should count as a mitigating factor.

A concise timeline

1. May 19, 2012
   Marcos is last seen alive

   Building records and later evidence focus the inquiry on the couple's apartment.

2. Late May 2012
   Investigation expands

   Police review surveillance, travel and physical evidence.

3. June 4, 2012
   Elize is arrested

   She admits responsibility during the investigation.

4. December 2016
   Jury convicts

   Jurors find her guilty of qualified homicide and concealment of a body.

5. 2017
   State court maintains judgment

   São Paulo's appellate court upholds the conviction.

6. March 2019
   STJ reduces sentence

   The court recognizes confession as a mitigating factor and reduces the term to 16 years and three months.

Evidence in a private setting

The homicide occurred inside a residence with no surviving eyewitness to the fatal moment. Investigators assembled a chronology from building cameras, digital communications, travel movements and recovered physical evidence. Elize's statements confirmed responsibility but differed from the prosecution on planning and motive.

A confession is evidence, not permission to ignore all other proof. Brazilian criminal procedure allowed the jury to weigh her account alongside the forensic and circumstantial record.

The jury's decision

Jurors accepted qualified homicide and concealment charges. The verdict established that Elize was criminally responsible. Public discussion often focuses on the couple's wealth, infidelity and lifestyle; those themes can explain media attention but should not replace the elements actually decided in court.

Current biographies sometimes describe sentence progression as though it erased the verdict. It did not. Conditions of imprisonment and release are governed by sentence-execution law and are separate from guilt.

Why the STJ reduced the sentence

In 2019, the Superior Court of Justice applied its established rule that a confession may mitigate punishment when it contributes to the judge or jury's understanding, even if the defendant also offers a defensive explanation. The court reduced the sentence by two years and six months.

The decision did not acquit Elize or change the homicide into an accident. It adjusted punishment under sentencing doctrine while preserving both convictions.