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The tickets apparently sold out instantly, so I had not introduced this event here; however, tomorrow, August 26, I will appear at the OpenID Summit Tokyo “Interim Event” Special Edition.

I will be giving the Closing Keynote.

This is the Japanese version of the keynote I gave at EIC (Berlin) in May.

If you will be there, I look forward to seeing you there.

About OpenID Summit Tokyo 2026 “Special Edition”

Across a wide range of industries, including finance and manufacturing supply chains, frameworks and related technologies surrounding digital identity have become more important than ever.

Moreover, from the perspective of ensuring trust in the use of AI agents, digital identity has become an indispensable component.

The next OpenID Summit Tokyo was originally planned for 2028, but in light of this major turning point, we will hold 2026 in the summer of 2026 as a special edition.

Event overview

Date and timeAugust 26, 2026 (Wednesday)13:00 – 18:30 (scheduled)
VenueMarunouchi Building Hall & Conference Square
Venue address〒100-6307, Marunouchi, Chiyoda-ku, Tokyo2-chome4-1, Marunouchi Building 7F and 8F
OrganizerOpenID Foundation Japan
Attendance formatOnsite only / Japanese-language sessions only / no simultaneous interpretation
AdmissionFree / advance registration required
RegistrationPeatix (https://openid-summit-tokyo-2026-special-edition.peatix.com/) Please register via Peatix.

OAuth/OIDC Numa (沼) Workshop 2026

Incidentally, I will attend the OAuth/OIDC Numa Workshop the day before (that is, today). I only learned at the last minute that I would appear in the comedian slot, so I will be there.

  1. 10:00 – 10:15
    • Opening session and highlights of today’s event
      • ritou
  2. 10:15 – 10:40
    • Don’t wait for MCP—expand passkeys: can scoped passkeys solve delegation challenges?
      • 小岩井 航介 / KDDI Corporation
  3. 10:40 – 11:05
    • Chaining multiple OPs and ASs within a service: comparing a token chain that caused difficulties in a real project with “OAuth Identity and Authorization Chaining”
      • 名古屋 謙彦 / GMO Cybersecurity by Ierae, Inc.
  4. 11:05 – 11:35
    • OAuth SPIFFE Client Authentication
      • 川崎 貴彦 / Authlete, Inc.
  5. 11:35 – 12:45
    • Lunch break (boxed lunch provided)
  6. 12:45 – 13:10
    • Identity federation transformed by browsers: the future of authentication envisioned by FedCM and EVP
      • えーじ / Google
  7. 13:10 – 13:35
    • Redesigning OAuth/OIDC client authentication in mobile apps: organizing a design that combines attestation, asymmetric-key-based authentication, and PAR
      • 田中 翔真 / KDDI Corporation
  8. 13:35 – 14:00
    • Representing the contractual relationship between accounting firms and their clients with OIDC/OAuth: standardization considerations from implementing a B2B-specific delegation model and its state and reauthentication policies
      • 寺原 歩 / freee K.K.
  9. 14:00 – 14:30
    • What should we say about “OAuth authentication” in the age of AI?
      • 古川 英明
  10. 14:30 – 14:50
    • Break
  11. 14:50 – 15:15
    • Considering the private-sector ecosystem starting from the EUDIW framework: profiles derived by subtraction
      • 小松 隆行 / SoftBank Corp.、小西 優貴 / Maximax, Inc.
  12. 15:15 – 15:40
    • Identity verification initiatives at Mercari: the current state and future of adopting new technologies (tentative)
      • 合路 健人 / Mercari, Inc.
  13. 15:40 – 16:10
    • Digital Credentials API × OpenID4VP: implementation insights on browser-complete identity verification—possibilities and challenges seen in an Android PoC
      • 佐々木 慎之介 / KDDI Technology Corporation
  14. 16:10 – 16:30
    • Break
  15. 16:30 – 16:55
    • Applying OpenID Connect-related specifications to IHV-like use cases
      • 菊池 佑 / OPTiM Corporation
  16. 16:55 – 17:20
    • The path to interoperability revealed through implementing OpenID for Verifiable Credentials
      • 藤田 和成 / ITOCHU Techno-Solutions Corporation
  17. 17:20 – 17:45
    • Passkey-driven 1st-party account integration
      • 狩野 達也 / Mercari, Inc.
  18. 17:45 – 17:50
    • Closing
      • 崎村 夏彦
  19. 18:00 – 18:50
    • (Beer session) A grand gathering of comedians deep in OAuth—the OAuth Taalk!!!!
      • Nat
      • tkudos
      • ritou
      • kura
      • 56 (from the KYC WG)
      • Hanako (from the Education WG)
      • Tera☆ra (from TG40)

Event overview

  • Date and time：August 25, 2026 (Tuesday)10:00 – 18:50 (registration from 09:30)
  • Venue: Hibiya Kokusai Building Conference Square
  • Attendance: free / onsite only / Japanese-language sessions only (no simultaneous interpretation)
  • Requirement: participants able to attend the entire day
  • Event hashtags: #oauth_numa #ID沼

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