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Merger on July 1, 2026 / Tradition × Innovation

Lasting peace of mind,
today and tomorrow.

Beyond expertise. With genuine insight and a caring approach, we are a professional group that walks alongside your business for the long term.

Tax · Administrative · Labor experts One-stop support From founding to succession
Entrance of Sustaina Mate's Umeda office
Head Office Entrance — Osaka

Our Story

From founding to succession, by your side like the moon.

Every business has its peaks and valleys. Still, from crescent to full moon, we adapt the way we support you to match each stage of your journey.

Founding

Turning vision into form, taking the first step.

Growth

Building firm foundations, growing steadily.

Expansion

Widening possibilities, leaping to the next stage.

Succession

Passing on values, handing the baton forward.

Inheritance

Passing assets and wishes smoothly to the next generation.

Tax · Administrative · Labor & Social Security corporationsSpecialists supporting you, all in one place.

Group Structure

The Mate Group Structure

All the professional expertise you need, gathered in one group. That's what makes us truly one-stop.

MATE GROUP Sustaina Mate Inc.
(Group management & coordination)
Tax Corporation

Sustaina Mate
Tax Corporation

  • Tax advisory
  • Financial statements & filing
  • Inheritance & business succession
  • Management support
Learn more →
Coming soon Administrative Scrivener Corp.

Kanade Mate
Administrative Scrivener Corp.

  • Licensing & permits
  • Company formation support
  • Subsidy application support
  • Inheritance & wills

Opening soon

Labor & Social Security Corp.

Tsumugi Mate
Labor & Social Security Corp.

  • Labor advisory
  • Work rules
  • Social insurance procedures
  • Grant applications
Learn more →
Operating company

Sustaina Mate
Inc.

  • Group management
  • Brand & systems
  • Coordination of member firms

Our Purpose

What we deliver is peace of mind.

We are more than a firm that simply handles professional procedures. We are a partner that creates an environment where you can focus on running your business with confidence.

Expertise is the ticket in

Expertise is a given.
What we truly provide is peace of mind.

Easy to
consult
Quick
reassurance
Prevent
oversights
Spot
risks early
Ease
worries
More about Mate Group →

Real Voice

That concern? It's really about easing your worries.

Can I expense this? I'm thinking of buying a car… I'm thinking of hiring someone… How much should director pay be? Should I incorporate?

Each of these questions, one by one…

isn't really a "tax question" —
it's a "worry to put to rest."

Core Message

Beyond expertise.
Delivering peace of mind, supporting your progress.

Expertise is a given. Beyond that, we remain a partner who eases your concerns
and supports the growth of your business.