Sekisui House paid land fraudsters ¥5.5B — then kept its own investigation report sealed

In April 2017 a crew of 'jimenzhi' — con artists who impersonate landowners — offered Sekisui House, Japan's largest homebuilder, the site of the Kaikikan ryokan in Tokyo's Nishi-Gotanda for ¥7B. A woman posing as the owner appeared before the company; in reality the land belonged to an owner who had sent repeated certified letters denying any sale or provisional registration. The deal closed anyway: a ¥1.4B deposit in April and ¥4.9B more by check on June 1, leaving Sekisui House out about ¥5.55B for land its seller never owned.

The deal bent its own safeguards at every step. It went to registration without the title deed, on lawyer-prepared identity papers; lawyers involved specifically flagged that the identity of the 'owner' needed confirming, and the check was never run. Sekisui House paid the balance roughly two months ahead of schedule. The company's own later review recorded that these calls were made on the spot and never shared inside the firm; people familiar with the internal view counted at least ten moments when the transaction looked wrong.

Then came the cover-up of the cleanup. An investigative committee of outside auditors and outside directors produced a report on how the fraud happened — and Sekisui House did not publish it. In a shareholder derivative suit, the Osaka District Court ordered the report handed over; the company refused, lost on immediate appeal at the Osaka High Court, and finally submitted it. The redacted report surfaced on a critics' website, vivid on how the scam unfolded but, as Business Insider noted, silent on why a ¥7B deal skipped basic verification.

¥5.5B paid to land fraudsters for a Tokyo ryokan site; the committee report stayed secret until courts forced its release

Deal pressure beat diligence: registration proceeded without the title deed on substitute identity documents no one inside the company reviewed.

Verification had an owner on paper only: lawyers asked for the seller's identity check, it was never run, and the remaining ¥4.9B went out early.

Signals had no channel: the real owner's certified letters and repeated oddities never stopped a deal whose key choices were made ad hoc and not shared internally.

The company treated its own committee report as a liability, fighting disclosure in court rather than fixing what it described.

Big-company process is no control if nobody owns it. Lawyers on the deal said verify the seller; nobody did, payment ran early, and the probe report stayed secret until a court forced release.

The fraud crew was arrested and ringleader Misao Kaminskas is serving a prison term; court proceedings and tell-all books were still running in 2026, and most of the ¥5.5B has never been traced. The case inspired Netflix's 2024 drama 'Tokyo Swindlers'. Sekisui House, with about ¥4T in annual revenue, kept its position as Japan's top homebuilder, but the forced publication of the committee report remains a textbook example of why company-commissioned investigations struggle to look impartial.