Works
A selection of ZUKAI’s work to date.

TENSU
Overview Built around the concept of "Your day, in a single number," TENSU is an iOS app that lets you score and record how your day went on a scale of 0 to 100. How many points was today? You answer that question with just a single number. This small habit, finished in seconds, gradually visualizes the biorhythm of your days. Released on the App Store on May 12, 2026.
HPSC Recovery Map
Case overview. Client: High Performance Sport Center (HPSC) / Japan Sport Council (JSC). Inquiry: Creating diagrams for a guide for athletes that explains the scientific basis of recovery and links recovery methods to facility information. Project overview: We designed and produced a "Recovery Map" that systematizes the recovery methods and facility information across HPSC's multiple facilities so that athletes themselves can make use of them.
Community Drive Project
Case overview. Partners: SMART Fukushi Lab and Nikken Sekkei Ltd., among many others. Request: The "mobility challenge" facing regional cities is a complex social issue that goes beyond a mere lack of transportation, intertwining across every field including welfare, education, and logistics. As such, it is difficult for any single business or government to solve alone, requiring a unified approach among citizens, companies, and government.
hajimete
Overview. Built around the concept "Firsts, one at a time," this iOS app lets you jot down the small "firsts" of everyday life. A place you visited for the first time, a food you tried for the first time, a person you spoke with for the first time — it offers a way to carefully record the discoveries hidden in daily life. Released on the App Store on March 16, 2026. Download here.
Kadai
Overview Kadai is a web app that supports problem-solving for local governments, companies, and NPOs. Visualizing the structure of complex issues, gathering voices from the field, devising solutions, and managing progress—it supports the entire problem-solving process with a single tool. Regional issues, social issues, organizational issues. They rarely exist on their own. One issue triggers another, which in turn leads to yet another problem.
PACE
Overview. Built on the concept "Keep it fun, keep it moving forward," this iOS app visualizes your pace toward reaching a goal. By making it clear how much "you just need to do today," it offers a structure that lets you keep going without strain. It was released on the App Store on February 25, 2026. For ongoing goals tracked by count—reading, studying, exercise, habit-building, work—it shows your "remaining count" at a glance.

Supporting the Conceptual Organization of Disaster Environment Studies
Together with researchers from different fields of expertise, we deeply explored the concept of "Disaster Environment Studies"—which integrates the knowledge of disaster studies and environmental studies—and, through a process of discussion and visualization, established and systematized a shared understanding of its significance and research domains.

Business Model 3.0 Visual Guide
"Business Model 3.0 Visual Guide" is a book that introduces next-generation business models incorporating co-creativity and adaptability on top of economic value, social value, and creativity. It systematically explains, through case studies and diagrams, the mechanisms by which businesses evolve to grow sustainably while confronting social issues. A visual-guide-format book for learning the structure of business that the coming era demands.

Home Medical Care Issue Design Map
Case overview. Client: Toranomon Impact Capital LLC / Capital Medica Ventures Inc. Inquiry: They wanted to visualize where the challenges lie in making impact investments in companies that solve social issues in the home medical care field. Project overview: To advance impact investment in the home medical care field, they needed a tool for understanding the issues comprehensively and structurally.

Hands-On Support for Organizational Revitalization and Bottleneck Visualization
Case Overview Client Certified Nonprofit Corporation National Children's Cafeteria Support Center, Musubie Inquiry We want to identify the organizational issues we should tackle in order to create an environment where members can act more autonomously. Project Overview Musubie is an NPO that supports children's cafeterias nationwide. Now in its sixth year, its activities have expanded. However, with that expansion, its organizational issues have also become more diverse.

Support for the Benesse Business Model Analysis Contest
Case overview. Client: Benesse Corporation. Request: Continuing from 2022, to deliver lectures for the Business Model Analysis Contest and serve as a judge for student submissions. Project overview: Benesse Corporation has held a business model analysis contest for university students since 2021.

Support for Creating the Nanao City Disaster Volunteer Center Manual
We created a manual that lays out chronologically how operators and volunteers act during recovery work. As part of the recovery and reconstruction following the 2024 Noto Peninsula Earthquake, operators and volunteers were working together on recovery, but the operations team saw frequent turnover, requiring the recovery process to be explained from scratch each time a new member joined, which caused confusion on site.

Women's Wellness Issues Design Map
We visualized the structure of social issues surrounding women's wellness, together with their causal relationships! It was created by the "Tokyo Wellness Impact Investment Limited Liability Partnership," which makes impact investments aimed at solving social issues in the wellness field.

Policy Diagrams
"Policy Diagrams" is a book for understanding policies and systems—which tend to become complex and technical—from their structure. It organizes the purposes, stakeholder interests, and causal relationships behind laws and measures through diagrams, visualizing "why this policy came about and how it functions." It offers a perspective that lets citizens, businesspeople, and policymakers discuss on common ground.

"Scenario Model" Released: Diagramming Initiatives to Solve Social Issues
Overview. Client: asobot inc. / The Nippon Foundation. Inquiry: They wanted to develop a tool that would help organizations and NPOs aiming to solve social issues to appropriately communicate their activities and intentions in order to gather supportive peers and funding. Project overview: We developed a tool that lets organizations communicate their activities simply to the external stakeholders who support them and deepen mutual understanding.

Online Course "Learning Business Models Through Diagrams" Released
The class "Learning Business Models Through Diagrams: Understanding the Basics and Finding Areas for Improvement (5 parts)" has been released on "schoo," the "learn-together" live video learning service! ▼ https://schoo.jp/course/7670 It seems you need to join a paid monthly plan to view all the content, but a trial class is also available. If you're interested, please take a look.

Dialogue Diversity Museum Diagram Panels
At the "Dialogue Diversity Museum: Dialogue Forest," we created diagrams summarizing the history and messages of Dialogue's activities to date. -----------What is the Dialogue Diversity Museum? A museum where you experience diversity by connecting—through "encounter and dialogue"—the things that divide the world, such as generation, disability, and culture.

Visual Thinking Tools Diagram Kit
Overview. Client: NPO Silent Voice. Inquiry: We want to develop a tool that helps deaf and hard-of-hearing children improve their communication skills. Project overview: Based on cases where miscommunication tends to arise between deaf people and between deaf and hearing people, we identified the elements for smooth communication and created a visual thinking tool to foster self-understanding and more.

Speaking at "The Significance and Potential of the Purpose Model"
We spoke at an event hosted by the Business Model Association of Japan. In a talk session with Ryusuke Koyama, Associate Professor at Nagoya University of Commerce & Business, we discussed the significance and potential of the "Purpose Model." Members of the Business Model Association (BMA) can access archives and materials from past lectures. For information on new membership, please see the page below.

Purpose Model: How to Build Co-Creation That Engages People
"Purpose Model" is a book that presents a way of thinking for implementing a company's or organization's purpose as actual businesses and projects, rather than leaving it as a mere philosophy or slogan. It concretely explains how to co-create with diverse stakeholders around a shared purpose. It is a design guide for practitioners working on purpose-driven management.

Caregiving Issue Design Map
Overview. Clients: Toranomon Impact Capital LLC and Capital Medica Ventures Co., Ltd. Request: To visualize where the challenges lie in making impact investments in companies solving social issues in the caregiving field. Project overview: To advance impact investment in caregiving challenges, a tool was needed to understand the issues comprehensively and structurally.

"Diagrams to Deepen Reading" Workshop Held
We held a four-month online diagramming workshop as part of the intensive short course "flier book camp." It was designed for people who experience things like forgetting what they read right away, being unable to finish a whole book, feeling they aren't making use of what they read, or giving up on books because they can't grasp the key points.

Lecture at the Faculty of Engineering and Design, Shibaura Institute of Technology
On May 7, 2022, we gave a lecture in the "Business Model Theory" course held by the Faculty of Engineering and Design at Shibaura Institute of Technology. The course runs across seven sessions on alternate Saturdays, and we were given one of those slots. Around 60 people attended, and we received feedback after the class. Thank you for the invitation! [Selected feedback from participants]

"Purpose Model" Creation Workshop on Co-Creation
On June 20, 2022, we held a Purpose Model workshop at SAAI in Yurakucho. The Purpose Model is a "blueprint for purpose-centered co-creation projects" that enables diverse stakeholders to work together. A book on the Purpose Model is scheduled for release in August, and this was an early opportunity to actually build a "Purpose Model."

Business Model Diagramming Workshop for a General Trading Company
We held a business model diagramming workshop for a general trading company. A volunteer project to diagram the company's internal business models was launched, and they took an interest in ZUKAI's business model diagrams. Thank you very much!

Diagram Supervision for the Book "Circular Design"
ZUKAI supervised the diagrams for this book. While listening to each case, we extracted the factors common to them, structured the information, and created diagrams based on a shared template. Released: Jan 28, 2022. ▼ View the Amazon page here: https://amzn.to/3m1ILPA

Financial Academy "Map of Accounting" Seminar
We were invited as a lecturer by Financial Academy in Marunouchi. It is a seminar for people who are somewhat interested in stock investment and have tried it a little, but honestly do not really understand accounting. ▼Details here https://www.f-academy.jp/school/accounting_map.html?psn=19108 ▼

Policy Design School Policy Diagram Workshop
We held a policy diagram workshop at "Policy Design School," METI's version of a design school. Together with 40 to 50 participants, including people from various ministries and private companies, we discussed how to visualize policy through diagrams and communicate it more clearly.

A 4-Part "The Map of Accounting" Lecture Series Published on Schoo
We appeared as speakers in a 4-part lecture series on the live-broadcast community "schoo." [Theme] Corporate value and social trends seen through accounting. Aimed at businesspeople who have already studied the basics of the three financial statements, the content also serves as a review. ▼ See here for class details. ※ Archives can be viewed with a paid membership registration. https://schoo.jp/class/

Business Model Database "Bizgram"
We have released "Bizgram," a business model database service! ▼Access the service here: https://bizgram.zukai.co Information about business models rarely becomes open, is rarely gathered in one place, and as of now is far from being in a transparent state. Bizgram is a service we started in order to improve that situation, even a little.

note Live "Accounting for People Who Create"
We had the opportunity to hold an accounting class on note Live. It's a class for everyone who wants to become a "person who creates"—someone who brings creativity to bear and creates value, whether in their company work or their personal activities. The content has been summarized on note Business! ▼https://note.com/notemag_business/n/ne2171e2520af

Student Business Plan Contest Online Lecture
We gave a lecture hosted by the "Miyazaki Student Business Plan Contest," Miyazaki Prefecture's largest business plan contest for students of universities, junior colleges, and technical colleges in Miyazaki Prefecture. [Miyazaki Bizcon Entrepreneurship Education Course, Vol. 6] Can You Diagram Your Business Model Too? A Course for Understanding Business Models https://www.miyazaki-u.ac.jp/

schoo "Accounting" Diagramming Class
We had the opportunity to teach a class on schoo. In the class, we cover not only an explanation of "The Map of Accounting" but also why businesspeople need to learn accounting. By understanding the big picture of "accounting" and the impression behind its terms, you can also understand why you need to learn it in the first place. It's viewable with a membership registration, so please check it out.

Yurakucho SAAI "The Map of Accounting" Publication Commemorative Lecture
We held an online commemorative lecture for the publication of "The Map of Accounting," hosted by "'SAAI' Wonder Working Community," an incubation office in Yurakucho operated by Mitsubishi Estate Co., Ltd. and 01Booster Inc. With 188 registrations, the event concluded as a great success. Details: "Understand the Flow of Money All at Once with a Single Diagramming Method: 'The Map of Accounting'"

The Map of Accounting
"The Map of Accounting" is a book designed to help readers understand accounting not as rote memorization or specialized knowledge, but as an "overall structure." It visualizes through diagrams how the fundamental elements of accounting—capital, liabilities, assets, revenue, expenses, and profit—connect and circulate. Designed so that readers can intuitively grasp the meaning of numbers and the role of accounting, it is a book for executives and business professionals.

Serialized Column Launches in the Business Magazine "THE21"
Our serialized column has launched in "THE21," a business magazine published by PHP Institute. Featured articles are being released one by one in our News section. News page here. Browse back issues of "THE21" here. http

METI Policy Diagram Training
At the Ministry of Economy, Trade and Industry (METI), we held online training on "policy diagrams" for over 80 METI officials. In the post-training survey, we received comments such as the following: "Very interesting," "I felt the range of applications is wide," "I resonated with the philosophy of stripping away as much extraneous information as possible to make things easier to understand when discussing the essence," "I felt it was effective not only for explaining to others but also for clarifying my own

ESG Diagrams
We created diagrams on "ESG investment" in collaboration with the Government Pension Investment Fund (GPIF). These diagrams answer questions such as "What exactly is ESG? Why does it matter?" while giving a bird's-eye overview. Ideal for anyone who has heard the term ESG investment but doesn't know what it involves. The diagrams follow below.

How to Make Diagrams That Reveal the Mechanics of Business
The Smart Shinsho "How to Make Diagrams That Reveal the Mechanics of Business" is a book packed with the know-how of Bizgram (business model diagramming), gained from giving talks and workshops on Bizgram for numerous companies and government bodies after publishing the Business Model 2.0 Visual Guide. While the Business Model 2.0 Visual Guide featured 100 case studies, this book focuses on the how-to of diagramming.

SoftBank Lecture
We gave a lecture at SoftBank. With 400 participants, it was one of the largest audiences we have ever had. Thank you to everyone who attended!

Free 2.0
We contributed an article titled "Free 2.0" to the relaunched first issue of Hakuhodo's magazine "Kohkoku (Advertising)." The book itself was sold for 1 yen, making it an experimental publication — an extremely thick volume of over 600 pages. The full text of this article is available online. Read the full article here: https://note.com/bizgram/n/n07aeb84117b4

METI Future Dialogue Room Workshop
At the Future Dialogue Room of the Ministry of Economy, Trade and Industry (METI), we gave a lecture and held a discussion on business model diagrams for about 40 METI officials. Tetsuro Kondo, Makoto Okiyama, Maki Munakata, Keiichi Furukawa, Tomoyuki Nishibori

Hakuhodo DY Holdings Lecture
At the request of Hakuhodo DY Holdings, we gave a lecture on business models.

Loftwork Event Lecture
We spoke at "Service Design Scramble—Imagining Other Companies' New Services on Our Own," an event hosted by Loftwork Inc. Based on the content of the Business Model 2.0 Illustration Guide, we talked about "the structure of paradox." See here for event details. Tetsuro Kondo

NTT Data Workshop
At the request of NTT Data Corporation, we held a business model diagram workshop for the company's employees. Tetsuro Kondoh, Makoto Okiyama, Maki Munakata, Keiichi Furukawa, Ken Tadokoro

Sumitomo Corporation Labor Union Lecture
At the request of the Sumitomo Corporation Labor Union, we gave a lecture on business models. Tetsuro Kondo

Cabinet Office Management Design Sheet Utilization Seminar
We spoke at the Cabinet Office–hosted seminar "Management Design Sheet Utilization Seminar: Designing the Mechanisms That Create Future Management and Value," on the theme "Thinking About the Business Models at the Core of the Management Design Sheet Through Diagrams." Tetsuro Kondo

Recruit Career Lecture
We gave a lecture on business models at Recruit Career Co., Ltd., explaining how to read business model diagrams and introducing case studies. Tetsuro Kondo, Makoto Okiyama

Nikkei × note "N Salon"
We handled the planning, design, and operation of a seminar for "N Salon," a new community launched through a partnership between Nikkei and note. N Salon combines the best of both worlds—NIKKEI's "business" and note's "creativity"—to provide a place of learning for all kinds of people. We led a seminar called "Business Model Diagram Camp," where we created a participatory community for learning together while sharing the diagrams we made.

Kitakyushu City Event Lecture
We gave a lecture on business models in Kitakyushu City. At an event called "External Planning Meeting," an exchange gathering between NPOs and companies, we also held a workshop where participants from NPOs and companies mingled to create business model diagrams. Tetsuro Kondo

Schoo "Business Model Diagramming Class"
We held a class called "Business Model Diagramming Class" on Schoo, broadcast live over the internet. We held the first session on December 21, 2018, and the second on January 11. The first session was lecture-style. In the second session, we did a live broadcast review on the spot of the business model diagram homework assigned in the first session. Tetsuro Kondo

PERSOL CAREER Lecture
At PERSOL CAREER CO., LTD., we gave a lecture on business models. Tetsuro Kondoh

HOPE by NewsPicks
We were involved in the planning and production of the first issue of "HOPE," a free magazine published by NewsPicks. Under the theme "Diagramming business models of hope," we featured a total of eight business model diagrams. We also consulted on the planning side, including the question of which businesses to choose in the first place. Around 50,000 copies were distributed, mainly within Tokyo.

NTT Resonant Lecture
At NTT Resonant Inc., we gave a lecture on business models and held a workshop on diagramming business models. Tetsuro Kondoh, Makoto Okiyama, Takuya Kawano, Maki Munakata, Ken Tadokoro, Tsuyoshi Kayamori

GAFA Business Model Diagrams
We contributed business model diagrams to a GAFA mook published by Yosensha, featuring four diagrams: Google Home, Amazon Go, Internet.org (Facebook), and Apple Watch. After release, we published the full text of the section we worked on. Please see it below. Read the free article on note here.

Monthly Business Model Diagrams
"Monthly Business Model Diagrams," a subscription magazine of business model diagrams. It is a project that delivers one article per month introducing various business models through diagrams. Each month, the feature theme is decided based on reader requests and the editorial team's recommendations, and each article includes four or more diagrams tied to the feature. We introduce the latest diagrams not even included in the "Business Model 2.0 Illustration Guide," which diagrammed 100 business models.

Nikkei-Hosted Workshop
Hosted by Nikkei Inc., we held a business model diagram workshop. About 50 participants from a wide range of backgrounds joined us. We talked about diagramming business models and ran the workshop. The full three-hour program—two hours of lecture and one hour of workshop—was packed, yet when each group presented at the end, their presentations were solid.

Nikkei MJ Series
We ran a series of business model diagrams in Nikkei MJ. The series ran 14 times over three months, from August to November. The 14 diagrams we covered were AmazonGo, Ore no French, Pop Team Epic, WAmazing, Warby Parker, EVERLANE, ZOZOSUIT, b8ta, PoliPoli, ecbo cloak, Sakana Bacca, and Petit Lawson.

Business Model 2.0 Visual Guide
"Business Model 2.0 Visual Guide" is a book that decodes business models from their structure. Using diagrams, it shows how they differ from conventional business models and their turning points, clearly explaining "how they earn revenue and what value they create." It is a visual guide for those thinking about new businesses or business transformation.

Class at Nagano Prefectural Komoro Commercial High School
We held a class for first-year students at Nagano Prefectural Komoro Commercial High School. Under the theme "Is business interesting?", it was a two-period back-to-back class (100 minutes total) introducing ways of thinking about diagramming business models, along with real examples. We were invited by Kadokawa ASCII Research Laboratories, as part of a program for high school students.
