Vision
No company lives alone.
Around it are distributors, partners, customers.
And soon, AI.
Nobody is in charge.
People come and go, things shift and change,
and somehow the whole thing stays alive.
That's an ecosystem.
Leave it alone, and it runs wild.
Hold it too tight, and it dies.
So don't control it. Take responsibility for it.
Own your ecosystem.
2016
Founded in Otemachi, Tokyo. From identity implementation to a product company.
1M+
User accounts managed by Tactna. Running at leaders in manufacturing, finance, and education.
0
churn. Every customer is still on Tactna.
Mission
「Authentication is solved. Lifecycle is the next frontier. People join, change roles, and leave, and now AI agents join them. Nobody had a layer that keeps who and what can get into which app always current. We are building that layer as Tactna."
Yoshito Sudo
CEO & Founder, TC3 K.K.
The shift we see
AI agents will need an owner, a role, app access, and expiry too. Tactna's lifecycle model extends from human users to agents as is. Not just who, but what can get in, managed in the same ledger.
Companies keep adding products for customers and partners. With IDs and organizations split per app, every joiner, mover, and leaver creates a gap. You need a platform where one ID and one organization model are shared by every app.
Customers and partners managing their own users and access becomes the norm. Combining delegation with governance is at Tactna's core: the manufacturer sets policy, partners run their side, and Tactna keeps everything in sync.
From implementing enterprise identity platforms to scaling B2B SaaS and rolling out products at major financial institutions. TC3 pours its experience as a leading Okta (Auth0) partner in Japan into Tactna.
CEO & Founder
Led the R&D team in San Francisco as Chief Architect and Platform Lead at Appirio / Topcoder, an early Auth0 (Okta) implementer. Former Principal Engineer at Realcom (TSE-listed).
Director of Engineering
Formerly Liigo and Flagxs. Led product development as CTO at several IT startups. Deep experience scaling B2B SaaS platforms.
Director of Customer Success
Formerly SoftBank Technology and Realcom. As an IT consultant, led many product rollouts at major financial institutions.
AI & Strategy Advisor
Former head of Ricoh Research and of Sony C&A Laboratories. M.S., Stanford University.
Global GTM Advisor
Formerly Okta. Led GTM teams in SaaS and cybersecurity at Okta, Oracle, and others.
Founded in Tokyo. Software development for large enterprises and government, and identity implementation centered on Auth0 (Okta).
Office at FINOLAB in Otemachi, Chiyoda-ku. Expanding work with major companies in finance and manufacturing.
Certified for an information security management system under the international standard. Later extended to ISO 27017 (cloud security).
Tactna launches as SaaS, a platform for customer and partner IDs across multiple applications. Fujitsu G-Search adopts it as its shared ID platform.
The business focuses on Tactna. Production launches at CPA Excellent Partners and KITZ establish a track record in external partner ID lifecycle governance.
Validation in the US market begins with manufacturers and distributor networks. A roadmap extending the ID lifecycle from people to AI agents is published.
