Overview
- Police arrested Otsu Yoichiro, 43, a 2nd-class sergeant from the Asaka garrison, on November 22 on suspicion of attempted murder, identifying him as an acquaintance of the victim.
- The victim, a woman in her 40s, was stabbed outside a basement live-house in Akasaka on November 16 and suffered serious injuries that damaged internal organs but she survived.
- CCTV relay tracking captured a man loitering from around 8 a.m., marking an event poster with an X, following the woman into the building, then fleeing by bicycle toward Aoyama with later sightings in Shinjuku.
- Investigators say footage shows the suspect cycling from the garrison to Akasaka in the morning and returning after the attack, and a bicycle believed to have been used was found during a home search.
- Police describe steps suggesting planning, including changing shoes, using shoe covers and gloves, and swapping clothing during the escape, while the suspect denies involvement, saying he did not do it.