Background
In early December 2025, Tanaka (a pseudonym), a client from Tokyo, came to us with a problem that had persisted for years.
The problem Tanaka faced
Ten years earlier, Tanaka had created a cryptocurrency wallet to store an early investment in Bitcoin. However, after 10 years, even the memory of the original password had become unclear, leaving only a few fragments of information to offer as clues.
What made the situation even more daunting was that Tanaka did not know the wallet had been set up with two layers of encryption.
Tanaka’s situation
- Assets: 1.8 BTC (worth approximately tens of millions of JPY)
- Time elapsed: 10 years since the wallet was created
- Password recollection: Entirely unclear, with only a few clues
- Encryption level: Two passwords; the client was unaware of the second layer
- Only clue: Fragmentary information in a carefully preserved photograph
- 10 years earlier
Tanaka created a cryptocurrency wallet and stored Bitcoin in it
- Early December 2025
Having completely forgotten the password, Tanaka consulted us as a last hope
- Mid-December
Recovered the first-layer password and discovered a second layer of encryption
- Late December
Deployed large-scale computing resources and recovered the second-layer password just before those resources ran out
Technical recovery process
Stage 1: Building trust and gathering clues
After several in-depth conversations, Tanaka gradually came to trust us and shared a photograph that had been carefully preserved for years. It contained only fragments of information, far too little to provide direct access to the wallet’s assets.
We quickly organized the information and obtained the wallet file, which had remained inaccessible for years, through a special channel.
Stage 2: Recovering the first-layer password
We developed a custom recovery program and deployed computing resources to attempt recovery.
The first breakthrough
Because the wallet had been created relatively early, its encryption was not particularly strong, and we recovered the first-layer password within a few days.
Everyone on the team felt relieved and believed success was within reach.
Stage 3: Discovering an unexpected second layer of encryption
A moment of despair
Just as we were certain of success, we discovered a second password barrier.
When we asked Tanaka about it, the client was completely bewildered and had not even known that a second-layer password existed.
At that moment, hope seemed both within reach and impossibly far away, and the whole team briefly fell into despair.
Stage 4: The final push
Giving up was not an option for us. After an urgent meeting, the team decided to make one last attempt: deploy large-scale computing resources for a full-scale recovery effort.
Anxiety followed us every day. Computing costs continued to mount, and because we had promised the client that fees would be charged only upon success, with no upfront payment, failure would mean a substantial loss for us.
Time passed like a countdown, and the pressure grew day by day.
A last-minute success
Just as our resources were nearly exhausted and we began considering cutting our losses, the turning point arrived
We recovered the second-layer password!
When we calculated the costs, the profit on this case was minimal, but we had avoided a loss. In the end, we upheld our commitment and helped the client recover the lost assets.
Asset recovery
After successfully recovering the passwords, we immediately helped Tanaka transfer the assets.
The 1.8 BTC was safely transferred to a new hardware wallet. A 10-year wait finally came to a happy conclusion.
- 1.8
- BTC recovered
- Tens of millions of JPY
- Asset value
- 10 years
- Time the wallet was inaccessible
- 100%
- Recovery success
Project results
| Item | Result |
|---|---|
| Recovered assets | 1.8 BTC |
| Asset value | Approximately tens of millions of JPY |
| Problem type | Completely forgotten passwords for a doubly encrypted wallet |
| Technology used | Latest U.S. password recovery technology + large-scale computing resources |
Fees
| Fee item | Details |
|---|---|
| Upfront fee | JPY 0 — completely free assessment |
| Computing costs | Covered by us |
| Technical costs | Covered by us |
| Success fee | Charged after successful recovery — no recovery, no fee |
Client testimonial
“For 10 years, I thought I would never get this Bitcoin back. I had completely forgotten the password and could not even remember a hint.”
“When I heard that they had recovered the first-layer password, I was too excited to sleep. But when I learned there was a second layer, my heart sank. I did not even remember setting a second-layer password.”
“They never gave up. Just as I was about to abandon all hope, I received a call: ‘Tanaka, we have recovered your password.’”
“At that moment, I burst into tears. It was not about the money; I was moved by their persistence and professionalism. Despite taking on the risk of enormous computing costs, they never once asked for an upfront payment.”
“After 10 years, the lock finally opened. Thank you so much!”
Key factors in the successful recovery
The client’s trust
Shared a treasured photograph and every clue that could be remembered
Custom recovery program
Developed dedicated recovery algorithms tailored to the characteristics of early wallets
Large-scale computing resources
Accepted the risk of substantial costs and conducted a full recovery effort with large-scale computing resources
Determination to persist
Chose to continue at the most difficult point instead of cutting our losses
Technical advantages
The latest U.S. password recovery technology
- The latest cryptanalysis algorithms developed in Silicon Valley, U.S.
- Custom recovery solutions tailored to wallets from different periods
- High-performance GPU parallel computing
- Our own large-scale computing center, ensuring data security and computing speed
- Extensive experience with double-encryption recovery
Applicable situations
We can resolve the following problems
- Completely forgotten passwords with only a few clues
- Password recovery for wallets with multiple layers of encryption
- Cryptocurrency wallets created in the early days
- Partial password recollections or hints
- Intact wallet files that cannot be accessed
Authenticity statement
This report is based on a real case
Some information has been anonymized to protect the client’s privacy.
All technical details and recovery processes are based on actual records.
To learn more about the technical details, please book an in-person consultation at our office