The Hikari Mother and Daughter Murders

On April 14, 1999, 23-year-old Yayoi Motomura and her infant daughter Yuka were killed in Hikari, Yamaguchi Prefecture. The criminal case became one of Japan's most closely watched sentencing disputes because the defendant, Takayuki Otsuki, had only recently turned 18 when the crimes were committed.

The victims

Yayoi Motomura was 23 years old. Her daughter Yuka was 11 months old. Reliable reporting from the Supreme Court proceedings identifies both victims by name and age. Yayoi's husband and Yuka's father, Hiroshi Motomura, became a prominent public advocate for crime victims during the years of litigation that followed.

The public attention around the case often centered on punishment and juvenile justice. This file keeps the central fact in view: a young mother and her baby were killed in their home, and their family then endured years of appeals and retrial litigation.

The crime and arrest

Takayuki Otsuki, then 18 years and one month old and previously known by the surname Fukuda, entered the Motomura residence in Hikari on April 14, 1999. Courts later convicted him of offenses arising from the killings of Yayoi and Yuka, including murder and sexual violence against Yayoi.

The case was not an unsolved identification problem. Otsuki was arrested and prosecuted, and the dispute that dominated later proceedings concerned criminal responsibility and, especially, whether the appropriate sentence was life imprisonment or death.

Life imprisonment in the first two rounds

The Yamaguchi District Court initially sentenced Otsuki to life imprisonment in 2000. The Hiroshima High Court upheld that outcome in 2002. Contemporary reporting noted that his youth played a major role in the lower courts' sentencing analysis.

Japanese juvenile law barred the death penalty for offenders who were under 18 at the time of an offense. Otsuki was just over that threshold. The legal controversy therefore was not whether a death sentence was categorically prohibited, but how heavily his age and prospects for rehabilitation should weigh against the gravity of the crimes.

The Supreme Court orders a new sentencing review

In June 2006, Japan's Supreme Court rejected the lower appellate court's life-sentence analysis and sent the case back to the Hiroshima High Court. The court did not simply pronounce a death sentence at that stage; it ordered the lower court to reconsider punishment under a stricter application of Japan's capital-sentencing standards.

The distinction matters because the case's procedural history is unusually long. A sentence that appeared final after the first appeal was reopened by the Supreme Court, producing a new appellate judgment two years later.

The death sentence

In April 2008, the Hiroshima High Court, hearing the case after remand, sentenced Otsuki to death. The defense appealed.

On February 20, 2012, the Supreme Court's First Petty Bench rejected that appeal. The ruling made the death sentence final. Reporting from The Japan Times and AFP identified the court's conclusion that the seriousness of the offenses outweighed mitigation based on Otsuki's age at the time of the crime.

This page does not describe Otsuki as executed. A final death sentence and an execution are different events, and reliable sources consulted for this review continue to describe him as a death-row prisoner.

Retrial requests

After the death sentence became final, Otsuki pursued retrial proceedings. A second retrial request was rejected by the Hiroshima High Court in 2022. Reporting by Jiji Press said the court concluded that the new materials did not create reasonable doubt about the findings of the final judgment.

The litigation continued. Kyodo News reported in April 2026 that the Hiroshima High Court had rejected a third retrial request in a decision dated February 27, 2026. The defense filed an objection to that rejection. The new request relied in part on expert material concerning Otsuki's mental condition and responsibility at the time of the offense; the high court concluded that the submission did not undermine the final judgment.

Accordingly, the current status is precise: the 2012 death sentence remains final, while post-conviction retrial litigation has continued. The existence of a retrial request does not itself amount to an acquittal or reversal.

Why the case became nationally significant

The case became a major point of debate over sentencing defendants who were legally juveniles under the age-of-majority rules then in effect but were old enough to receive capital punishment under the Juvenile Act. The Supreme Court's handling of the case was widely discussed in relation to Japan's earlier capital-sentencing framework and the weight courts should give youth and rehabilitation.

It also became closely associated with the movement for greater recognition of victims and surviving family members in Japan's criminal-justice system. That broader social legacy should not be confused with the specific judicial findings, which concern the crimes proved against Otsuki and the sentence imposed.

Timeline

1. April 14, 1999
   Yayoi and Yuka Motomura are killed

   Yayoi Motomura, 23, and her 11-month-old daughter Yuka are murdered in Hikari, Yamaguchi Prefecture.

2. 2000
   Life sentence

   The Yamaguchi District Court convicts Otsuki and imposes life imprisonment.

3. 2002
   Life sentence upheld

   The Hiroshima High Court leaves the life sentence in place.

4. June 20, 2006
   Supreme Court remand

   The Supreme Court overturns the sentencing outcome and sends the case back for reconsideration of punishment.

5. April 22, 2008
   Death sentence imposed

   The Hiroshima High Court sentences Otsuki to death after the remand.

6. February 20, 2012
   Death sentence becomes final

   The Supreme Court rejects Otsuki's appeal.

7. March 31, 2022
   Second retrial request rejected

   The Hiroshima High Court rejects another attempt to reopen the case; the defense challenges that decision.

8. February 27, 2026
   Third retrial request rejected

   The Hiroshima High Court rejects a third request for retrial. The defense files an objection, leaving post-conviction proceedings active.

Current status

Solved / adjudicated; final death sentence with continuing post-conviction litigation. Takayuki Otsuki was convicted of the crimes against Yayoi and Yuka Motomura. His death sentence became final in 2012. As of the 2026 reporting reviewed for this file, a third retrial request had been rejected and the defense had objected to that rejection.