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: Outcome — Deadbody recovery
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 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 DetailsK Injured in Alleged Murder Attempt by Sato, Nakano Ward, Tokyo, Japan
On September 16, 2024, 26-year-old K was stabbed in the neck with scissors inside his luxury high-rise apartment in Nakano Ward. His 25-year-old girlfriend, Sato, was arrested at the scene on suspicion of attempted murder, …
State/Province: Tokyo, Japan | City/Region: Nakano Ward | Incident Type: Domestic Violence Homicide | Date: Sept. 16, 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 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 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 DetailsShiori and Sato Allegedly Murdered by Haruki, Nagoya, Japan
According to the video report, Japanese influencer and former host Haruki allegedly killed two women in December 2023. He allegedly drowned his live-in partner Shiori in their bathtub at about 3 a.m., then went to …
State/Province: Aichi, Japan | City/Region: Nagoya | Incident Type: Murder | Date: Dec. 4, 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 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 DetailsUnnamed first male victim and Unnamed male victims Allegedly Murdered by Miyuki Ueta, Hiroshima, Japan
The source describes seven men who died in or near Kurayoshi between 2004 and 2009, with sleeping medication reportedly found in their blood. The deaths were initially classified as suicides or accidents despite unusual circumstances, …
State/Province: Hiroshima, Japan | City/Region: Hiroshima | Incident Type: Murder | Date: Jan. 14, 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 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
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