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 — Control/domination
Haruka 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 DetailsKaren Suzuki Murdered by Shogo Nishimitsu, Osaka, Japan
On May 16, 2024, Karen Suzuki, a 19-year-old university student living in Osaka, was fatally stabbed by her boyfriend Shogo Nishimitsu, who confessed to the murder. Nishimitsu had lied about his employment status and concealed …
State/Province: Osaka, Japan | City/Region: Osaka | Incident Type: Domestic Violence Homicide | Date: May 16, 2024
View DetailsYutaro Takashima and Nosako Takashima Allegedly Murdered by Wakayama Kito, Kyoko, and others, Tokyo, Japan
In April 2024, two burned bodies of a wealthy couple, Yutaro Takashima and his wife Nosako, were found in the mountains of Nasu Town, Tochigi Prefecture. Wakayama Kito, a former child actor, was arrested as …
State/Province: Tokyo, Japan | City/Region: Tokyo | Incident Type: Murder | Date: April 15, 2024
View DetailsNakata Tachibana Allegedly Murdered by Genki Yamanaka, Izumisano City, Osaka, Japan
On May 9, 2023, 18-year-old Nakata Tachibana was found dead in an apartment in Izumisano City, Osaka, after suffering brutal and sustained physical abuse by her boyfriend Genki Yamanaka, 22. Yamanaka admitted to assaulting Tachibana …
State/Province: Osaka, Japan | City/Region: Izumisano City | Incident Type: Non-Murder | Date: May 9, 2023
View DetailsSana Hirabayashi Allegedly Murdered by Akira, Tokyo, Japan
On February 2, 2023, 24-year-old Sana entered a Tokyo love hotel with Akira, a 54-year-old man she had met through a dating app in a financially transactional relationship. According to the source, Akira had given …
State/Province: Tokyo, Japan | City/Region: Tokyo | Incident Type: Murder | Date: Feb. 2, 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 DetailsShota Allegedly Murdered by Tatsuya and Misako, Wakayama City, Japan
In Wakayama City, a tragic family incident occurred involving a remarried couple, Tatsuya and Misako, and Misako's son Shota. Tatsuya, who was unemployed and addicted to pachinko, frequently demanded money from Misako and subjected her …
State/Province: None | City/Region: Wakayama City | Incident Type: Family Homicide | Date: Jan. 14, 2023
View DetailsMs. O Allegedly Murdered by Kojiro Yamamoto, Sakai, Osaka, Japan
On the night of August 26, 2022, 20-year-old college student Ms. O, also referred to as Ms. Wang in parts of the transcript, was fatally stabbed in Sakai City by her 23-year-old boyfriend, Kojiro Yamamoto, …
State/Province: Osaka, Japan | City/Region: Sakai | Incident Type: Murder | Date: Aug. 26, 2022
View DetailsKako Sasaki Allegedly Murdered by Kojiro Yamamoto, Sakai City, Osaka, Japan
On August 26, 2022, Kako Sasaki, a 20-year-old university student in Sakai City, Osaka, was fatally stabbed by her ex-boyfriend Kojiro Yamamoto after a recent breakup. The incident involved domestic violence, jealousy, and a violent …
State/Province: Osaka, Japan | City/Region: Sakai City | Incident Type: Murder | Date: Aug. 26, 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 DetailsWano-ka Allegedly Murdered by Shohei Komori and Izumi Komori, Sumida, Tokyo, Japan
In August 2021, 18-year-old high school student Wano-ka from Sumida Ward, Tokyo, went missing after saying she was meeting a friend. Her body was found days later in Yamanashi Prefecture. Shohei Komori, 27, and his …
State/Province: Tokyo, Japan | City/Region: Sumida | Incident Type: Murder | Date: Aug. 28, 2021
View DetailsKyohei Wada Allegedly Murdered by Sakiko Miura, Towada, Japan
On March 29, 2021, Kyohei Wada, 30, died after suffering a deep neck wound from a bread knife at the home he shared with Sakiko Miura, 27, in Towada, Aomori. Miura called emergency services and …
State/Province: Aomori, Japan | City/Region: Towada | Incident Type: Domestic Violence Homicide | Date: March 29, 2021
View DetailsSato Ishizawa Murdered by Yoshiki Mizumoto, Koshigaya, Saitama, Japan
On September 30, 2020, Yoshiki Mizumoto, 35, attacked his former romantic partner Sato Ishizawa, 23, near her workplace in Koshigaya, Saitama. The source reports that Mizumoto had been married while conducting an affair with Ishizawa, …
State/Province: Saitama, Japan | City/Region: Koshigaya | Incident Type: Murder | Date: Sept. 30, 2020
View DetailsAkihiko Sekiya Allegedly Murdered by Komi Koga, Toa Town, Hokkaido, Japan
According to the source, on August 30, 2020, Akihiko Sekiya, 41, died in hospital after his wife, Komi Koga, 45, allegedly brought a lit gas burner close to his face while kerosene had spilled on …
State/Province: Hokkaido, Japan | City/Region: Toa Town | Incident Type: Domestic Violence Homicide | Date: Aug. 30, 2020
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