Kenichi Takano was convicted of killing livestreamer Airi Sato after a dispute over 2.55 million yen in loans.
On March 11, 2025, livestreamer Airi Sato was murdered by Kenichi Takano, a longtime viewer and financial supporter, after he tracked her down in Tokyo's Takadanobaba district.
More than a year later, the motive behind the attack has finally come into focus.
What began as a parasocial bond between streamer and supporter turned toxic when Takano started treating his financial support as a debt Sato was obligated to repay.
From viewer to creditor?
Takano first discovered Sato through her livestreams before becoming a regular supporter, and he also visited the hostess bar where she worked.
Over time, he said he gave or lent her roughly 2.55 million yen — around $16,000 — after she asked for help with living expenses and phone bills.
Takano claimed that Sato repaid only a small fraction of the money. He had drained his savings and taken out consumer loans to provide the rest, leaving him in serious financial difficulty.
The distinction between a gift and a loan became central to the case.
Takano insisted the money had to be repaid and eventually filed a civil lawsuit against Sato. He won, but the judgment did little to recover his funds: when he later seized her bank account, it held a miserly 160 yen ($1).
"She was making money while owing me"
Takano reportedly told investigators that he could not accept Sato continuing to make money from livestreaming while allegedly owing him money.
He also claimed he wanted the public to learn what she had done, suggesting he saw the attack as both revenge and a way to expose her.
On the morning of the murder, Takano travelled from Tochigi Prefecture to Tokyo after learning Sato's streaming schedule.
He watched her broadcast, used nearby landmarks to pinpoint her location, and approached her while she was walking alone.
What the trial revealed
The trial added detail to the parasocial relationship behind the case.
Takano had spent roughly 2.4 million yen on virtual items through the livestreaming app, as well as on food and drinks at the hostess bar where Sato worked. Separately, he claimed he had lent her another 2.55 million yen.
Prosecutors argued that Sato's failure to repay left Takano feeling deceived, fuelling his resentment.
The defence pointed to his financial desperation and failed attempts to recover the debt as mitigating circumstances.
The court took those circumstances into account when sentencing Takano, but they did not excuse the killing.
The ruling instead exposed how a parasocial bond had become entangled with money, expectations, and resentment — until Takano no longer viewed his support as voluntary spending, but as a debt he believed Sato owed him.
