The data management product "HimitsuBako," which employs a structure that prevents even the operating side from viewing user data content, has been officially released for all operating systems.

This product achieves high security through its mechanism that protects data content, based on robust, cutting-edge data protection technologies of zero-knowledge encryption and end-to-end encryption (E2EE).

Furthermore, its features include "immediate use," "immediate saving," and "immediate sharing"—specializing in instantaneity.

It also securely manages diverse data beyond just password management. It supports a wide range of uses from personal to business, and sharing with family or teams, providing a secure and smooth data management environment from daily life to business.

In recent years, as the rapid increase in the amount of information handled online has made data management and security risks a social issue, "HimitsuBako" presents a new way of information management that balances safety and convenience.

HimitsuBako, in addition to the web version released in May 2026, is now compatible with Mac, Windows, iOS, and Android as of July 2026, establishing a system that allows flexible access according to the usage environment.

The choice to protect important information all in one place.

A secure place to store information digitally.

<Overview of New Product "HimitsuBako">

"HimitsuBako" is a zero-knowledge data protection product that can securely store, manage, and share information in all its forms. Traditionally, important data such as passwords, IDs, contract information, photos, and memos have been managed across multiple services and applications, leading many people to spend a lot of time managing and searching for stored information. As the need for digital data management increases, the complexity of management and the risk of information leakage are becoming challenges. It provides a new mechanism that encrypts all user data and allows for smooth management under the simple yet robust security of a single, secure "HimitsuBako."

◆"HimitsuBako" Details Public URL https://www.himitsubako.jp/

<Technical Features>

"HimitsuBako" incorporates end-to-end encryption (E2EE) and zero-knowledge proof (ZKP). The data is stored in an encrypted state on the user's device, and a technical structure is employed where even the operating side cannot view the content of the user's data, thus achieving high security.

While conventional cloud storage relies on "trust," this service adopts a mechanism where the data content itself cannot be viewed by the service provider, offering a new approach that guarantees security through system design.

Increasing Information, Increasing Worries

<User Challenges and Background>

In recent years, with the spread of digital services, our personal information is routinely accumulated online. Looking specifically at password management, modern users are said to hold an average of about 100-200 passwords (around 70-250 according to some surveys), and the increase in the number of accounts leads to complex information management (based on survey data from NordPass, etc.). Furthermore, actions like logging in and authentication occur daily, with users performing login operations multiple times a day (approximately 5-15 times), and many users reportedly experience password resets or account recovery more than once a month. This situation creates a burden in managing dispersed information, and as a result, it indicates that many users feel stress and inconvenience in managing their personal information.

However, on the other hand, awareness of risks surrounding information management is not always sufficient. Despite the increasing importance of data management year by year, the overall societal security awareness is not keeping pace, which is a challenge.

Given this background, the essence of the problem lies not just in simple password management, but in how to safely and efficiently handle all personal information dispersed across multiple services.

Therefore, "HimitsuBako" is characterized by expanding its scope to "overall information management," which includes account information, authentication information, and various data generated across services, not limited to traditional "password management."

This aims to reduce the time spent searching for "individual important information stored somewhere" that only the user knows, and the burden of managing data generated each time, thereby creating an environment where users can allocate resources to actions and decision-making they should focus on.

HimitsuBako Addresses Societal and User Challenges

HimitsuBako is a data management product that simultaneously achieves:

"High Security"

"Instantaneous Operability"

"Integrated Management of Diverse Information"

<Features of HimitsuBako> Feature 1)

Information is protected by zero-knowledge encryption and end-to-end encryption (E2EE), employing a security model where even the operating side cannot view the content.

Feature 2)

It provides a smooth data management experience through a design that allows instant execution of major operations such as saving, searching, sharing, and logging in.

Feature 3)

It realizes an environment where diverse digital information, which tends to be dispersed, such as IDs, documents, memos, and images, can be managed safely and efficiently, not limited to passwords.

<Main Functions>

Information Management

Management of passwords and IDs

Saving of memos, important documents, images, files, etc.

Drag-and-drop operation for all files

Authentication and Account Management

Fast login with passkeys in an instant

Use with Others (Sharing Function)

Sharing with family/groups

Send only to those you want to show (Temporary direct sharing function)

Usage Environment

Usable anytime, anywhere (Offline use supported)

Information management in a private space

Device Integration

Data synchronization between web and app versions

Multi-device support (Same user experience on all devices)

Organize for Clarity (Organization and Search)

Classification by tags (Personal labels, group labels, group labels)

Visually distinguishable by color

Pin important information with one click

No need to remember passwords with touch/face authentication. Simple and secure. Important information can be reliably protected.

Easily classify "personal information" and "shared secrets" with labels.

HimitsuBako in Daily Life

<Usage Image>

Personal Use <<Protect>>

Securely manage your important information all in one place.

【Before/Challenge】

Personal information such as passwords, memos, documents, and images is dispersed across multiple apps and locations, increasing the effort to find necessary information and the burden of management.

【After/Solution】

"HimitsuBako" consolidates and manages various digital information beyond just password management. It provides an environment where necessary information can be quickly searched and confirmed. Furthermore, important information is protected by zero-knowledge encryption and end-to-end encryption (E2EE), allowing for secure management.

→ Reduces time spent searching for information, achieving information management that balances safety and ease of use.

Work/Business Use <<Find Quickly>>

Quick access to necessary information.

【Before/Challenge】

Business documents and login information are dispersed across multiple tools and locations, complicating information comprehension and management, and requiring time for management.

Sharing methods can also pose information management risks.

【After/Solution】

"HimitsuBako" organizes various information necessary for work, such as business documents, account information, and memos.

Utilizing organization features like labels and pinning, as well as search functions, allows for smooth reference to necessary information.

Furthermore, information is protected by robust encryption technology, providing a secure data management environment.

→ Reduces time spent searching for and organizing information, leading to increased efficiency.

Supports the creation of an environment where you can focus on your work.

Shared Use <<Connect>>

Securely connect important information with family and teams.

【Before/Challenge】

When sharing information among family or team members, information management tends to become dispersed across chats, emails, and individual file transmissions, making it difficult to find later.

【After/Solution】

"HimitsuBako's" "Sharing" function enables safe and flexible information linkage tailored to the purpose.

Shared spaces can be created for families or teams, allowing information to be managed in an organized state.

Additionally, the temporary sharing function allows for flexible delivery of only necessary information to specific individuals.

Since sharing scope and viewing methods can be controlled according to the use case, important family records and confidential team information can be shared with peace of mind. Shared information is also protected by a security-conscious mechanism.

→ Resolves the issue of dispersed information,

Achieves new sharing by securely connecting and delivering necessary information to the right people.

<Value Proposition>

This service provides the following value:

Data protection through zero-knowledge encryption

Secure communication and storage through end-to-end encryption (E2EE)

Secure data synchronization between devices

Flexible sharing and access permission management

Instant processing of saving, searching, sharing, and logging in

Integrated management of diverse information such as IDs, documents, memos, and images, not limited to password management

Through these, HimitsuBako provides an information management environment that balances "safety" and "comfortable usability."

<Supported Environments>

This service can be used in the following environments:

Web Version

Instant use from a browser (no installation required)

https://web.himitsubako.jp/

App Version

Installable from official stores.

Mac Version (Mac App Store)

https://apps.apple.com/jp/app/himitsubako/id6775376925?platform=mac

Windows Version (Microsoft Store)

https://apps.microsoft.com/detail/9P6QNHB1P688?hl=ja-jp&gl=JP

iOS Version (App Store)

https://apps.apple.com/jp/app/himitsubako/id6775376925

Android Version (Google Play)

https://play.google.com/store/apps/details?id=com.bpsjp.himitsubako

We deliver the same user experience regardless of the device, according to your usage environment.

HimitsuBako to More People

<Advertising Placement Overview>

To coincide with the official release on each platform, posters for "HimitsuBako" will appear next to the doors of all subway cars in the city. This deployment coincides with the timing of Hakata Yamagasa, a traditional event in the region of our発信拠点. Advertisements utilizing our self-designed logo mark are being displayed.

Media Name: Poster advertising space next to doors in subway cars

Placement Period: July 1, 2026 –

Target Lines: Fukuoka City Subway (Kuko Line/Hakozaki Line)

Model: All 4000 series trains

<Intent of Subway "HimitsuBako" Poster Advertisement>

The "HimitsuBako" in-car advertisements will deliver the following three points to more people:

1) The newly released product "HimitsuBako"

As part of the initiative to deliver "HimitsuBako" and its worldview through both online and offline channels, we will create touchpoints with the newly officially released product "HimitsuBako" through posters in the cars of the Fukuoka City Subway (Kuko Line/Hakozaki Line), which has many users, in a way that is continuously and casually visible within the daily commute route.

2) An opportunity to recognize the challenges of information management

In a daily life overflowing with data, we provide an opportunity to recognize the challenges of information management, which has become complex with passwords and data dispersed everywhere. We aim to lead to an understanding of the value of secure information management provided by "HimitsuBako" as an opportunity to reconsider the way information is managed and protected, which we handle casually every day.

3) [Protecting Important Information] HimitsuBako's Approach to Data Protection and Authentication

With the background of security technologies such as zero-knowledge design and end-to-end encryption, we also intend to promote understanding of the concept of privacy protection, which is "protecting by designing it so that no one can see it," including the fact that even the operating side cannot view the content of the data, in a natural way.

[HimitsuBako Logo Mark]

A New Form of Information Management Realized Through Technology

<Vision for HimitsuBako>

In work and daily life, I have always felt the challenge of "where to securely store important information." Believing that existing services do not sufficiently balance safety and convenience, we developed HimitsuBako as a product based on a zero-knowledge architecture that realizes a structure where even the operating side cannot view the data content.

Through HimitsuBako, we aim to realize an environment where individuals' important information can be handled more securely and more simply, and to expand the form of information management that is naturally used in daily life.

【Development Team Comments】 <Concept>

This product was developed with the three-in-one concept of "Safety, Simplicity, and Beauty." While maintaining high security, we have stripped down the functions and emphasized a simple experience that anyone can use intuitively. Because it is simple, we aimed for a product that users would want to keep close at hand and use daily.

<Technology>

Zero-knowledge proof is at the core of our safety, but relying on existing libraries presented performance challenges. Therefore, we implemented our own solution, achieving both practical-level security and speed.

<About Brain Power Solutions Inc.>

Brain Power Solutions Inc. (BPS) is a group of engineers with strengths in AI and identity technology, with the corporate message "Smarter Tech Stronger Minds." Utilizing advanced architectural design and cutting-edge technology, we support customer digital transformation from conception to implementation.

<Inquiries Regarding This Matter>

Brain Power Solutions Inc.

Sales & Marketing Department

Mail: [email protected]

Tel: 092-983-7151

FACT BOX

  • Source: PR TIMES
  • Category: 製品リリース
  • Organizations: HimitsuBako / NordPass