In a poignant first trial held at the Sendai District Court, the defendant, Renma Sato, acknowledged the major charges of murder and corpse abandonment in connection with the killing of nursery teacher Yuka Goshi last April, while denying accusations related to theft. Goshi, a single mother, was brutally stabbed to death, and the incident highlighted the troubling circumstances surrounding their relationship, which began as a romantic connection through a matching app but escalated after Goshi's unexpected disclosure of her pregnancy and desire for marriage.

The prosecution’s opening statement revealed disturbing details about the defendant's actions leading up to the murder. Sato had reportedly borrowed significant sums from Goshi under false pretenses and had conducted online searches suggesting premeditation before the attack. These included searches on how to dispose of Goshi’s body and inquiries about killing drugs. After the murder, Sato attempted to cover his tracks by discarding key evidence in nearby areas, reflecting a calculated effort to evade responsibility. The prosecution argued that Sato viewed the prospect of parenthood as burdensome, especially as Goshi had expressed hope for raising a child together.

During the court proceedings, emotional testimony was brought forth including a voice message from Goshi's young son pleading for her to return home. This deeply resonated with the court, highlighting the tragic impact of the crime on innocent lives. Goshi’s mother, a witness in the trial, expressed her ignorance of the circumstances leading up to the murder, alluding to her daughter’s struggle to deal with the situation alone. The complexity of the case and the tensions surrounding it underscore the societal issues related to domestic relationships, responsibility, and the profound implications of violent crime on families and communities.