An influencer in Japan owes a company millions of dollars in damages over a collaboration deal that went south. A court agreed with the plaintiff in the case that the online star violated her contract when she got a boob job without their knowledge.
The controversy centers on 31-year-old model and YouTuber Tenchim (てんちむ), a.k.a. Hashimoto Tenka, who’s amassed a 1.69 million user following. Tenchim struck up a partnership to create a night bra in partnership with company Yuiku.
According to a lawyer who summarized the case on X, the product was a huge hit, raking in 3.7 billion yen (USD $24M). That might have been due to Tenchim’s claims that the bra had helped her breasts grow. But then it came out that Tenchim had been making these claims without divulging that she had received breast augmentation surgery.
The YouTuber went on a break and tried resolving the issue with the company, sending them an unspecified amount of money and asking them to refund buyers. However, according to Tenchim, the company didn’t seem keen on issuing refunds. (One user on X says they never got reimbursed after returning the product.)
Tenchim sued Yuiku to get a better accounting of how Yuiku was using its funds. The bra maker countersued her for 500 million yen ($3.25M) for breach of contract. This week, a Tokyo court ruled in the company’s favor, finding that Tenchim owed them 384M yen ($2.47M).
Tenchim’s made light of the verdict, apparently in a bid to garner fan sympathy. She changed her profile name on X to 圧倒的敗訴 (attouteki haiso, complete loss in court), and her description to “a.k.a. 圧倒的債務者” (attouteki saimusha, absolute debtor).

“The court case?” she wrote in a tweet. “Take a guess.”
Planning a trip to Japan? Get an authentic, interpreted experience from Unseen Japan Tours and see a side of the country others miss!

"Noah [at Unseen Japan] put together an itinerary that didn’t lock us in and we could travel at our own pace. In Tokyo, he guided us personally on a walking tour. Overall, he made our Japan trip an experience not to forget." - Kate and Simon S., Australia


Want more news and views from Japan? Donate $5/month ($60 one-time donation) to the Unseen Japan Journalism Fund to join Unseen Japan Insider. You'll get our Insider newsletter with more news and deep dives, a chance to get your burning Japan questions answered, and a voice in our future editorial direction.

Stay connected while in Japan with an eSim from our partners at Inbound Platform. Get fast and unlimited 5G data, access across 99% of the country, and excellent English language customer service. No chip to install - just download into your phone and use as soon as you land! (Affiliate link)

Get the white-glove treatment with a luxury ride from the airport – Haneda, Narita, or Osaka (KIX) – with Inbound Platform’s taxi service. Your driver will be waiting for you at the airport. If there are issues, you can depend on their highly-rated English language customer support. (Affiliate link)

Want to speak better Japanese before your trip to Japan? Or just for fun? Use Preply to connect with a native speaker and practice, no matter where you are in the world. Improve your Japanese while also making new friends and learning about Japanese culture and history. (Affiliate link)
On a June 23rd broadcast on her channel, the entertainer mused that she might have to file personal bankruptcy if she lost her lawsuit. Shortly after that, she confessed that she’d had a real estate application rejected.
“Of course you can’t get approved if you talk brazenly about filing bankruptcy,” she bemoaned. “I’m an idiot.”
Tenchim is now indicating she’ll pay off the huge debt by…doing the same thing all over again. Shortly after the first version of this story went to press, she shared a tweet on X showing a number of bra designs in progress. “Paying bra debt with bras,” she wrote.

As for the company, Yuiku, its website is now nothing more than a statement that it won’t comment on the issue. Its Google Business listing has been review-bombed and currently sits at 1.2/5 stars.
Have thoughts on this article? Share them with us on our Bluesky account or the Unseen Japan Discord server.
Tip This Article
We’re an independent site that keeps our content free of paywalls and intrusive ads. If you liked this story, please consider a tip or recurring donation of any amount to help keep our content free for all.
What to read next

Company to Release CD for Dead Japanese Singer – With Her Private Nudes Included
Fans and even politicians are angry at a record company’s plans to include unreleased nudes of enka singer Yashiro Aki in its CD release.

Fuji TV Independent Committee: Nakai Masahiro Committed Sexual Assault
On top of certifying that Nakai sexually assaulted a Fuji TV reporter, the committee revealed he was relieved when she ultimately quit.

How The Fuji TV Scandal Became a Cultural Reckoning For Japan
The Nakai Masahiro/Fuji TV scandal feels like the most impactful media scandal in decades in Japan. What set it apart?