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Japan
Country Intelligence Summary
49
Dec. 31, 2025
Top Motives and Outcomes in Japan
Top Motives
- Jealousy — 35 case(s)
- Revenge — 21 case(s)
- Control/domination — 17 case(s)
- Eliminate romantic partner — 14 case(s)
- Money / Financial Gain — 12 case(s)
Top Outcomes
- Arrest made — 42 case(s)
- Legal case ongoing — 32 case(s)
- Homicide during marriage — 30 case(s)
- Investigation still ongoing — 26 case(s)
- Deadbody recovery — 16 case(s)
State / Province Case Counts in Japan
9 case(s)
3 case(s)
3 case(s)
3 case(s)
3 case(s)
3 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)
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 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 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 DetailsHusband, Mother-in-law, and others Allegedly Murdered by Masako Kishimoto, Tsuruga, Fukui, Japan
On November 17, 2019, in Tsuruga, Fukui Prefecture, Masako Kishimoto, aged 72, allegedly murdered her 95-year-old mother-in-law, 93-year-old father-in-law, and 70-year-old husband in their shared home. The killings were reportedly motivated by extreme caregiving fatigue, …
State/Province: Fukui, Japan | City/Region: Tsuruga | Incident Type: Family Homicide | Date: Nov. 17, 2019
View DetailsMizuki Miura, Sogonis Sogonishinaka, and others Disappearance Involving Takahiro Shiraisi, Zama, Kanagawa, Japan
Takahiro Shiraisi, a Japanese man born in 1990, exploited vulnerable individuals with mental health issues via Twitter by pretending to offer help to those contemplating suicide. He lured victims to his apartment in Zama, Kanagawa, …
State/Province: Kanagawa, Japan | City/Region: Zama | Incident Type: Murder | Date: Aug. 22, 2017
View DetailsSayaka Kuromitsu Allegedly Murdered by Boyfriend, Kure City, Hiroshima, Japan
On New Year's Eve 2013, Sayaka Kuromitsu, a 23-year-old circulatory nurse living in a women-only dormitory in Kure City, Hiroshima Prefecture, was found collapsed on the dormitory stairs and later confirmed dead. The incident occurred …
State/Province: Hiroshima, Japan | City/Region: Kure City | Incident Type: Murder | Date: Dec. 31, 2013
View DetailsWatanabe Hiko Disappearance Involving Watanabe, Minami Otokuni Town, Kyoto, Japan
In 2013, Watanabe Hiko, a 37-year-old housewife from Nagaokakyo City, Kyoto Prefecture, disappeared without apparent reason, leaving behind her husband and son. Despite a missing person report filed by her husband, no clues were found …
State/Province: Kyoto, Japan | City/Region: Minami Otokuni Town | Incident Type: Murder | Date: Sept. 6, 2013
View DetailsAsako Kato and R Allegedly Murdered by Tomohito Sugimoto and Noriko Sugimoto, Nagoya, Aichi, Japan
Asako Kato, a 41-year-old female manga café employee in Nagoya, suddenly went missing on April 13, 2012. One year later, her decomposed body was found buried in Minamichita Town, Aichi Prefecture. Tomohito Sugimoto and his …
State/Province: Aichi, Japan | City/Region: Nagoya | Incident Type: Domestic Violence Homicide | Date: April 13, 2012
View DetailsMinoru Ono Allegedly Murdered by Shoko Ono, Sasaki Sakichi, and others, Sapporo, Hokkaido, Japan
Minoru Ono, a 35-year-old self-employed man in Sapporo, was violently assaulted by multiple men in a parking lot near his home on January 9, 1999, after returning home. The attack was orchestrated by his wife, …
State/Province: Hokkaido, Japan | City/Region: Sapporo | Incident Type: Murder | Date: Jan. 9, 1999
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