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[SITUATION] · [QUIET] · [CRIME]

2 clusters · 3 sources · 21 days · First seen · Last updated

Ota City murder and attempted murder investigation

Overview

On September 25, 2026, an attack occurred at a residence in Ota City, Gunma Prefecture, resulting in the death of 52-year-old Yuka Tezuka and injuries to her 26-year-old son. Authorities suspected the attack was premeditated, noting that a knife had been prepared in advance.

Following an initial arrest for attempted murder, 30-year-old Riki Mihara was later re-arrested on suspicion of murdering Ms. Tezuka. Investigators determined that Mihara entered the residence through the entrance and waited in the living room to ambush the victim. Mihara has reportedly admitted to the allegations, stating, ‘There is no mistake.’

Entities

Riki Mihara · Yuka Tezuka · Takasaki City · Gunma Prefecture Police · Ota City

Timeline

  1. [CRIME] 2 sources
    Riki Mihara re-arrested for murder in Gunma stabbing case

    Police have re-arrested Riki Mihara for the September murder of Yuka Tezuka in Ota, Gunma, after he allegedly ambushed her in her home.

  2. [CRIME] 3 sources
    Ota City murder suspect arrested after fleeing on foot

    Riki Mihara, 30, has been arrested for the murder of a woman and the attempted murder of her son in Ota, Gunma. Police are investigating domestic violence as a possible motive.

Sources

fnn.jp · news.cube-soft.jp · shimotsuke.co.jp