Japan
Country Intelligence Summary
108
Dec. 31, 2025
Top Motives and Outcomes in Japan
Top Motives
- Jealousy — 56 case(s)
- Revenge — 44 case(s)
- Control/domination — 39 case(s)
- Fear of exposure — 39 case(s)
- Eliminate romantic partner — 32 case(s)
Top Outcomes
- Arrest made — 96 case(s)
- Legal case ongoing — 89 case(s)
- Homicide during marriage — 65 case(s)
- Investigation still ongoing — 62 case(s)
- Deadbody recovery — 53 case(s)
State / Province Case Counts in Japan
19 case(s)
10 case(s)
7 case(s)
5 case(s)
4 case(s)
4 case(s)
4 case(s)
4 case(s)
4 case(s)
4 case(s)
3 case(s)
3 case(s)
2 case(s)
2 case(s)
2 case(s)
2 case(s)
2 case(s)
2 case(s)
2 case(s)
2 case(s)
1 case(s)
1 case(s)
1 case(s)
1 case(s)
1 case(s)
1 case(s)
1 case(s)
Cases in Japan: Motive — Revenge
Haruka Komatsumoto Murder Case, Shika, Ibaraki, Japan
On December 31, 2025, Haruka Komatsumoto, a 31-year-old pregnant manicurist, was found stabbed and beaten in her apartment in Shika, Ibaraki Prefecture. Her husband discovered her bleeding at the entrance. The police found no signs …
State/Province: Ibaraki, Japan | City/Region: Shika | Incident Type: Murder | Date: Dec. 31, 2025
View DetailsHaruka Komatsumoto Allegedly Murdered by Takumi Ouchi, Mito, Ibaraki, Japan
Haruka Komatsumoto, a pregnant nail technician in Mito, Ibaraki Prefecture, was allegedly murdered by her ex-boyfriend Takumi Ouchi. The case involves stalking, obsessive behavior, and a brutal attack using two weapons—a hammer and a kitchen …
State/Province: Ibaraki, Japan | City/Region: Mito | Incident Type: Murder | Date: Dec. 27, 2025
View DetailsAiri Sato Allegedly Murdered by Kenichi Takano, Takadanobaba, Shinjuku, Tokyo, Japan
On March 11, 2025, at approximately 9:50 a.m., 22-year-old live streamer Airi Sato (broadcaster name 'Kami') was fatally stabbed over 30 times on a street in Takadanobaba, Shinjuku-ku, Tokyo, by 42-year-old viewer Kenichi Takano. Sato …
State/Province: Tokyo, Japan | City/Region: Takadanobaba, Shinjuku | Incident Type: Murder | Date: March 11, 2025
View DetailsHase Allegedly Murdered by Yahara, Kawamura, and others, Ebetsu City, Hokkaido, Japan
In October 2024, 20-year-old university student Hase was found dead in a park in Ebetsu City, Hokkaido, with severe trauma and stripped naked. Six suspects, including Yahara, Hase's girlfriend, and five friends, were arrested after …
State/Province: Hokkaido, Japan | City/Region: Ebetsu City | Incident Type: Murder | Date: Oct. 26, 2024
View DetailsHirasawa Toshino Allegedly Murdered by Wakai Manabu, Shinjuku, Tokyo, Japan
Hirasawa Toshino, a 25-year-old Japanese bar manager and aspiring influencer, was fatally stabbed in Tokyo on May 8, 2024, by Wakai Manabu, a 51-year-old former friend who had become romantically obsessed with her. The source …
State/Province: Tokyo, Japan | City/Region: Shinjuku | Incident Type: Murder | Date: May 8, 2024
View DetailsMs. M Disappearance Involving Shota Ozawa, Kofu City, Yamanashi, Japan
In spring 2024, Ms. M, a 40-year-old employee in Kofu City, Yamanashi Prefecture, disappeared after leaving work. Security footage showed colleague Shota Ozawa waiting for her and later interacting with her. Ozawa had stalked Ms. …
State/Province: Yamanashi, Japan | City/Region: Kofu City | Incident Type: Murder | Date: April 30, 2024
View DetailsHara Tadayuki Allegedly Murdered by Nishitaka Mai, Iwaki Shohei, and others, Kawasaki, Kanagawa, Japan
Hara Tadayuki, a Japanese internet streamer known as YuiGa, was found dead inside a weighted suitcase near the Tama River in Kawasaki. According to the source, Hara had been in a financially exploitative relationship with …
State/Province: Kanagawa, Japan | City/Region: Kawasaki | Incident Type: Murder | Date: Dec. 15, 2023
View DetailsDeceased wife Allegedly Murdered by 78-year-old husband, Yasugi, Japan
A 78-year-old unemployed man in Yasugi City, Shimane Prefecture, was arrested after his deceased wife's body was found in their apartment on July 21, 2024, following a neighbor's complaint about a bad smell. According to …
State/Province: Shimane, Japan | City/Region: Yasugi | Incident Type: Murder | Date: Jan. 21, 2023
View DetailsKasan Allegedly Murdered by Susumu Terauchi, Hakata, Fukuoka, Japan
According to the video report, Susumu Terauchi stalked and harassed his former girlfriend, Kasan, after she attempted to end their relationship. Kasan consulted police, and an emergency restraining order was issued under Japan's Anti-Stalking Law. …
State/Province: Fukuoka, Japan | City/Region: Hakata | Incident Type: Murder | Date: Jan. 16, 2023
View DetailsDonna Nelson Allegedly Murdered by Kelly, Tokyo, Japan
Donna Nelson, a grandmother from Perth, was arrested in January 2023 at Tokyo's Narita airport carrying nearly 2 kg of methamphetamine. She was deceived in a prolonged romance scam by a man named Kelly, who …
State/Province: None | City/Region: Tokyo | Incident Type: Non-Murder | Date: Jan. 4, 2023
View DetailsY-san Disappearance Involving Katagiri Shu, Obihiro, Hokkaido, Japan
Y-san, a 47-year-old married high school teacher, disappeared after telling her family she was going to Kushiro on May 29, 2022. Police determined that she had been killed by Katagiri Shu, her married affair partner, …
State/Province: Hokkaido, Japan | City/Region: Obihiro | Incident Type: Murder | Date: May 30, 2022
View DetailsYoko Yoshida Injured in Alleged Murder Attempt by Keisuke Yoshida, Nishigome, Tokyo, Japan
On January 16, 2022, Yoko Yoshida was found unconscious at home and later died in hospital. Initially thought to be natural causes, an autopsy revealed lethal methanol poisoning. The investigation pointed to her husband, Keisuke …
State/Province: Tokyo, Japan | City/Region: Nishigome | Incident Type: Attempted Murder | Date: Jan. 16, 2022
View DetailsToshio Ohashi and Yoshito Ohashi Allegedly Murdered by Toshiko Ohashi, Asahi, Chiba, Japan
In November 2021, a fire in a detached house in Asahi, Chiba Prefecture, resulted in the deaths of Toshio Ohashi, a paralyzed husband, and his severely disabled son Yoshito. The wife, Toshiko Ohashi, escaped and …
State/Province: Chiba, Japan | City/Region: Asahi | Incident Type: Domestic Violence Homicide | Date: Nov. 17, 2021
View DetailsYoko Watanabe and Nozomi Watanabe Murdered by Ken Watanabe, Niigata, Japan
On November 7, 2021, nurse Ken Watanabe killed his wife, Yoko Watanabe, and their young daughter, Nozomi, in their home in Niigata. He initially staged the scene to resemble a suicide and created messages using …
State/Province: Niigata, Japan | City/Region: Niigata | Incident Type: Domestic Violence Homicide | Date: Nov. 7, 2021
View DetailsInoue, Inoue's father, and others Murdered by Endo Ki, Chuo City, Yamanashi, Japan
Endo Ki, a juvenile from Chuo City, Yamanashi Prefecture, developed an obsessive one-sided love for a female classmate, Inoue, which escalated into stalking and ultimately a violent arson-murder attack on her family. After being rejected …
State/Province: Yamanashi, Japan | City/Region: Chuo City | Incident Type: Domestic Violence Homicide | Date: Oct. 12, 2021
View Details