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Independent Technology Venture · Japan

We Build AI‑Powered Products for Real‑World Problems.

From intelligent communication to business software and career technology, HayAITech builds practical digital products designed to make everyday life and work better.

Explore Our ProductsOur Story

Vietnamese roots. Japanese inspiration. AI-powered possibilities.

SHARED ENGINEERING01AI COMMUNICATION02CAREERS03BUSINESS SOFTWARE

01Our Philosophy

Technology Should Solve Real Problems.

We focus on practical problems, thoughtful engineering, and software products that create meaningful value for the people who use them.

  1. 01

    Build with Purpose

    Start with real user needs rather than technology for its own sake.

  2. 02

    Engineer for Reliability

    Build software with attention to maintainability, security, integrations, and operational requirements.

  3. 03

    Apply AI Where It Matters

    Use AI to simplify complex tasks, improve communication, and make software more useful.

02Our Products

Independent Products. One Engineering Mindset.

Each product addresses a different problem, united by a shared commitment to practical software and thoughtful product development.

  • Status: Early Access

    01AI Communication

    HayAICall

    Making everyday communication in Japan easier with AI-powered voice technology.

    HayAICall explores how AI-powered phone assistance can help people communicate with Japanese organizations and navigate everyday tasks, including interactions with local services and businesses.

    Explore HayAICall(opens hayaicall.com in a new tab)

  • 02Recruitment Technology

    WorkInTokyo

    Smarter career discovery for the Japanese job market.

    WorkInTokyo is a Japan-focused career and recruitment platform bringing together job discovery, recruitment information, industry news, and AI-assisted career experiences.

    Explore WorkInTokyo(opens workintokyo.net in a new tab)
  • Status: In Development

    03B2B SaaS

    Kiriwake for Business

    Helping businesses approach everyday work with greater clarity.

    Kiriwake (切り分け, “to separate”) began as a tool that helps people with salary and side income organize the data they need for their annual tax return in Japan. Kiriwake for Business is being developed to bring that same clarity to business-focused software.

    Explore Kiriwake(opens kiriwake.jp in a new tab)

03The Story Behind Our Name

Three Ideas. One Technology Vision.

HayAITech connects Vietnamese roots, Japanese inspiration, and the possibilities of AI to build technology that is practical, thoughtful, and useful.

010203
The HayAITech symbol is built from the three ideas in the name: a rising accent, a precise frame, and the node that connects them.

  1. 01Vietnamese Roots

    Hay

    An expression of our origin and our ambition to create things that are good, useful, and worth building.

    In the mark: The rising accent, drawn from the dấu sắc of Vietnamese writing.

  2. 02Japanese Inspiration

    Hayai速い

    速い — fast. A reminder that technology should reduce friction, simplify tasks, and help people move forward.

    In the mark: A precise H frame, its forward-cut stem setting the direction of travel.

  3. 03Engineering the Future

    AI + Tech

    Artificial intelligence combined with thoughtful software engineering to turn ideas into practical products.

    In the mark: The node that connects both sides into one system.

Vietnamese creativity. Japanese precision. Intelligent technology that moves forward.

04How We Build

From Engineering Problems to Useful Products.

We combine software engineering, practical problem-solving, and appropriate applications of AI to build products that can evolve with real-world needs.

  1. 1

    Understand the problem

    Start from the people involved and the friction they face, before choosing any technology.

  2. 2

    Design a practical solution

    Shape the simplest product that solves the problem well, and decide where AI genuinely helps.

  3. 3

    Build with reliable engineering

    Write maintainable, secure, well-tested software that can be operated and extended with confidence.

  4. 4

    Validate, learn, and improve

    Put the product in front of real users, learn from how it is used, and keep improving it.

Engineering quality is what keeps a product useful.

A product is only useful if people can rely on it. Clear architecture, security, testing, and careful attention to integrations are what allow software to keep working as it grows — and what make it possible to keep improving it based on real-world feedback. The cycle repeats: each round of learning returns to understanding the problem better.

05The Founder

Built by an Engineer. Driven by Real Problems.

Hisashi Yamamoto is a software engineer of Vietnamese origin who began developing software in 2011 and moved to Japan in 2019. Combining an engineering background with cross-cultural experience, he is building HayAITech to create practical AI applications and software products that solve real-world problems.

Read Our Story

Hisashi Yamamoto

Founder & Software Engineer

  1. 2011

    Began developing software

  2. 2019

    Moved to Japan

  3. Today

    Building HayAITech

06Where We Are

Building Independently. Growing Intentionally.

HayAITech is currently an independent, early-stage technology venture developing and validating a portfolio of software products before formal incorporation.

Our focus is on building useful products, learning from real-world needs, and developing a sustainable foundation for future growth.

Stage
Independent, pre-incorporation
Portfolio
3 focused products
Location
Machida, Tokyo, Japan
Get in Touch

07Contact

Have a Problem Worth Solving?

We welcome conversations about our products, technology, potential collaborations, and practical applications of AI.

Contact HayAITech