Led · Seed · Dec 2025

Founded in 2022 and headquartered in Tokyo, Mutex builds software that streamlines medical insurance claim workflows. Its flagship platform, Reze, uses generative AI and machine-learning models to centralize prescription data, automate manual administrative tasks, prevent missed claims, and surface key management indicators. The product aims to reduce the workload of medical departments and physicians while boosting institutional revenue and accelerating digital transformation across hospitals and clinics. Mutex plans to deepen product capabilities and scale its organization to support broader adoption. The company recently secured seed financing to fund product development and team expansion, underscoring early investor confidence. No user, revenue, or other operating metrics were disclosed in the articles.

Participated · Series A · Feb 2018

Authlete provides a software component and SaaS solution that enables service providers to implement API access authorization (OAuth 2.0) and identity federation (OpenID Connect). The company serves customers across industries, with many in financial services, including the world’s largest digital bank in Brazil and the first digital bank in Japan. Authlete has contributed to the OpenID Foundation’s OpenID Certification test suite used to validate open banking/open finance API security implementations. Led by Takahiko Kawasaki and Ali Adnan, the company was founded in 2015 and is based in Tokyo, Japan. The product is positioned for rapid integration by banks, securities firms, media, and e-commerce providers. Authlete intends to expand globally, develop new products, and explore new industries in partnership with SBI Digital Asset Holdings. Authlete provides OAuth 2.0 and OpenID Connect implementation solutions via cloud and on-premises software that are integral to API security. Its solutions have been used by financial institutes and healthcare providers. The company closed a US$3m Pre-Series A round and intends to use the funds to accelerate adoption worldwide through a sales and marketing drive. Authlete is led by co-founder and representative director Takahiko Kawasaki. It was incorporated in 2015 and is based at Finolab, a FinTech incubation space in Tokyo. Last year the company was accepted into Level39, Europe’s largest tech community for FinTech, Cybersecurity and Smart cities in London.

Participated · Equity · Dec 2012

Jibe Mobile builds a cloud platform and SDK/APIs that let app developers add real-time communications—VoIP, video chat and over-the-top multiplayer features—into mobile apps with minimal code. The platform runs on Jibe’s global datacenters and proxy servers and is optimized where the company has carrier relationships to improve real-world quality. Jibe recently exited private beta and has more than 500 developers signed up; the product currently supports Android and the company is working on iOS support and a planned WebRTC version. Future roadmap items include multi-party video and developer‑requested overlays and features, with the company positioning itself as a bridge between developers and carriers (including support for the Joyn initiative). Financially, Jibe previously generated revenues and took only an $800,000 angel investment in its earlier business; the new round is its first external funding for the current platform. The company operates offices in Mountain View, London, Düsseldorf and Tokyo and will use the funding to finish product work and scale its global cloud and developer/carrier support. Jibe Mobile is a web site, mobile app and Facebook app that imports Facebook friends as contacts and enables text chat from Java phones (tested on a BlackBerry Curve). The app lets users send “shouts,” share Flickr photos, YouTube videos and RSS stories, browse channels and search Flickr/YouTube without leaving the app. Shared items can be forwarded to contacts as text and short audio messages; shouts appear as emoticon-like avatars. The service does not yet allow uploading users’ own photos or videos from phones to social networks. Jibe plans to add support for additional social networks such as Bebo and MySpace and more media services like PhotoBucket. The company launched in private beta with invites for the first 300 signups and raised $800,000 in angel money last December.