Now on Google Workspace Marketplace

The AI that never forgets
your context.NMai Intelligence Fortress

An AI assistant for Gmail that remembers your context and masks selected words before sending data to the AI. This is the first product from TSUKIWA Inc.

  • Remembers your context
  • Masks sensitive words before sending
  • Works in the Gmail side panel
TSUKIWA Inc. | Moving AI forward, safely. See our products
Free to use now
OUR PRODUCTS

Never forget. Never lose.

TSUKIWA develops products designed to safeguard what matters most. Examples include “NMai,” an AI that never loses sight of your work context, and “THUM-BUM,” an album that preserves your photos and videos exactly as they are. All of these products were born from our proprietary data technology.

Available now
PRODUCT 01

NMai Intelligence Fortress

The AI that never forgets your context.

This is an AI assistant for Google Workspace that operates within the Gmail side panel. It remembers the content of previous conversations and masks sensitive words before sending information to the AI.

  • Remembers the context of your conversations
  • Masks the words you choose before sending
  • Available in Japan and the United States
In development
PRODUCT 02

THUM-BUM

Just as you shot it. Just as beautiful.

This is an album app that lets you save photos and videos without compromising image quality. From the moment you capture them, your photos and videos are saved directly to the app in their original quality, and you can share your precious memories with family and friends.

  • No compression. No loss in quality
  • Keep even large videos just as they are
  • Take a picture, and it’s already saved
Coming soon
TECHNOLOGY
TMELPATENT PENDING
Handling data without degrading it.

TMEL is the proprietary data technology that powers TSUKIWA products. It enables the agile handling of critical data while preserving its integrity. THUM-BUM’s promise—“preserving that beauty exactly as it is”—stems from this technology.

Patent pending (October 2026)
Keep it as it isWe handle data in its original form, without cutting quality or content.
No file too largeDesigned to handle large data without throwing any of it away.
Built on protectionTechnology built around preserving data is the foundation of every product we make.
OTHER SERVICES

Other Initiatives

Leveraging the expertise gained through developing our own products, we also support companies in their use of AI. (Consulting and the TMH Method are currently available in Japanese.)

SECURITY & RESPONSIBILITY
That “automation” — can you trust it?

More and more companies say, “We can automate your work with AI.” And it’s true: automation is easy now. But because it’s easy, we want to ask a question.
Can that company explain where your company’s information goes? Something being easy and something being safe to trust are two different things. Safety takes the right knowledge.

How TSUKIWA keeps AI safe
◆Following Japan’s AI Promotion Act

As a business that uses AI, complying with Japan’s AI Promotion Act (the Act on the Promotion of Research, Development and Utilization of AI-Related Technologies) is a basic duty. We take this responsibility seriously and use AI in line with the law’s principles.

◆Working by established guidelines

We follow the guidelines of organizations such as the Generative AI Utilization Promotion Association (GUGA) in our work.

◆Knowledge, proven by certification
Generative AI Passport badge

Our CEO, Hidenori Tamai, holds the Generative AI Passport (GUGA), and is working toward further certifications such as the JDLA Deep Learning for GENERAL (G-Test), to prove the knowledge needed to use AI correctly.

◆Designing from information risk

What can be given to AI, and what should not? We start by working out, together with you, where your information goes and how it is handled.

◆Built on data-protection technology

As a company that has pursued data preservation as its core technology, we design systems that move your work forward on a foundation of safety.

⬇ Read our AI policy (PDF, Japanese)
Our policy on how we use AI.
A family walking home hand in hand
OUR BELIEF
We want to spread AI the right way: to shorten the hours people work, and to give back the time to live as human beings.

Saying “I’m off” as you leave home, walking back hand in hand, and talking about what’s for dinner tonight. Protecting those everyday moments is why TSUKIWA works with AI.

MESSAGE FROM CEO

A message from our CEO

Hidenori Tamai
Hidenori TamaiRepresentative Director & CEO
Generative AI Passport badge
Generative AI Passport
(June 2026)

IT has advanced, and progress in AI has made the world remarkably convenient. Research takes a moment, and AI can write text and create images for us. That is the age we live in.

But have our lives truly become richer?

Things were supposed to get easier, yet work hasn’t decreased — if anything, we have become busier. Time with family. Conversations with the people we care about. Photos of our children growing up. The things we should cherish most are the very things pushed aside by busyness, until one day they are lost. I have seen this happen in workplace after workplace.

That is what I want to bring back. And I want to protect it, so that it is never lost again. NMai and THUM-BUM were both born for this.

There are two phrases I hold dear.

守偶破知
Based on shuhari, the Japanese path to mastery. Keep the form, then break it. But instead of leaving it behind, go further and come to know its root. Never forget the root; never let the branches fall into disorder.
不偶成人
Do not become a “puppet in human form,” bound by forms, by AI, or by organizations. Live as a human being, and be happy.

To bring back what people must truly cherish, and to protect it. That is TSUKIWA’s work.

COMPANY

Company profile

Company
TSUKIWA Inc. (ツキワ株式会社)
Founded
March 5, 2026
Capital
JPY 5 million
CEO
Hidenori Tamai, Representative Director
Address
6F Shop & Office Bldg., Kashiwanoha Campus 148-2, 178-4 Wakashiba, Kashiwa-shi, Chiba 277-0871, Japan
Business
Development and provision of our own products (NMai Intelligence Fortress, THUM-BUM) / Research and development of our proprietary data technology, TMEL / AI adoption consulting

Contact us

Questions about our products, AI consulting, press inquiries, or partnerships — feel free to get in touch.