Integration Story
Two strengths,united as one.
"Half a century of trust" and "speed × cloud."
By combining different strengths, we create new value.
Former MateHistory & trust
- Founded in 1973, over 50 years of history
- Strong in inheritance and business succession
- Serving mid-sized companies to large corporations
- Expertise and a track record built over many years
Former SustainaSpeed & innovation
- A sense of speed
- Cloud adoption
- AI utilization
- Close support, responsiveness first
Tradition × Innovation ＝ Creating new value
We will integrate as Mate Group on July 1, 2026.Our Vision & Mission
Our beliefs
Why do we exist? These are the beliefs we have poured into "Lasting peace of mind, today and tomorrow."
Lasting peace of mind,
When we dug deep into why we became independent, what we arrived at was "freedom." And what we truly sought was the "peace of mind" that forms the foundation supporting that freedom. Being secure only for now, only for this year, means nothing — what matters is peace of mind that lasts 5 years, 10 years, even 20 years from now. We believe that lasting peace of mind is where the real value lies.
The phrase that encompasses all four is "Lasting peace of mind, today and tomorrow."
A partner in co-creating
a sustainable future.
We are not "teachers." Nor are we someone who instructs from above. We want to be a partner who faces the same direction as our clients, thinks together with them, worries together with them, and grows together with them.
Building expertise
of hospitality.
No matter how much knowledge we have, we cannot offer truly good proposals unless our clients feel able to share what is really on their minds. Only when a relationship of trust exists does expertise become "value."
Expertise
Tax, accounting, inheritance, business succession, labor affairs, and licensing support. As professionals, we keep learning and evolving.
Hospitality
Listening, understanding, and staying close. Above all, we value building relationships where clients feel safe to speak their true thoughts.
Lifelong Support
From founding to succession, walking alongside your life and business.
At every stage of your business, we aim to be your closest source of advice, supporting you over the long term.
One-stop,
Why Mate Group
The warmth of a solo practice, the strength of an organization.
We combine the approachability of a solo practice with the
A solo practitioner (individual office)
GOOD- Close and easy to consult
- Personal and intimate
- Hard to reach when they are busy
- Work stalls when they take time off; overly dependent on one person
- Reliant on their specialty; future is hard to see
Mate Group
STRENGTH- Easy to consult, simple to ask anytime
- Fast to respond
- Others can step in beyond your main contact
- Continuity and stability as an organization
- A wide range of specialties, all in one place
Combining the "closeness and approachability" of a solo practice with the "stability, continuity, and capability" of an organization.
Support Flow
From your first question,to peace of mind.
Reach out casually
Consult with us easily by phone, chat, or in person.
Prompt review & proposal
We review quickly and propose the best advice for you.
Spotting issues & sharing risks
We notice oversights and future risks and let you know.
Focus on your business with confidence
With your worries resolved, you can focus on growing your business.
For & Future
The clients we walk alongside, and the future we aim for.
The clients we walk alongside
Small and mid-sized businesses & sole proprietorsWe stay close and walk alongside you as your "closest partner" throughout your business's growth.
The future we aim for
Toward a family office for small and mid-sized businessesWe will continue to support the "lasting peace of mind" of your life and business, today and tomorrow.
Core Message
Beyond expertise.
Delivering peace of mind and supporting your progress.
Delivering peace of mind and supporting your progress.
Specialized knowledge is a given. Building on that, we remain a partner who
resolves your worries and supports the growth of your business.