---
title: "Team | G Productions Japan"
description: "How G Productions Japan is organized: a founder and contract specialists across six areas of expertise, supported by AI agents, with a person reviewing everything before delivery."
url: https://g-productions.studio/en/team
lang: en
alternate: https://g-productions.studio/team
---

Team

# A team of specialists, supported by AI.

Structure

## Six areas of expertise

Projects are led by our representative member and delivered with contract specialists across six areas of expertise. Outside experts join when a project needs them. AI agents support repetitive work such as research, prototyping and testing, under the direction and review of the specialist responsible for each area. People set the direction, review what is delivered, and are accountable for the result.

Representative member 1

Contract specialists 6 on average

AI agents Used in all six areas

1. Producer & Director, Founder 制作総指揮・代表社員 Günther Brunner / ブルンナー・グンタ Sets the direction and is accountable for quality and final approval.
2. Project Management プロジェクトマネジメント Schedules, priorities, and the quality bar.
3. Frontend Engineering フロントエンドエンジニアリング Web implementation, performance, accessibility.
4. AI Research AIリサーチ Model evaluation, agent design, generation pipelines.
5. Interface Design インターフェイスデザイン UI/UX, information architecture, prototyping.
6. Operations & Infrastructure 運用・インフラ APIs, data, and cloud operations.
7. Design Direction デザインディレクション Brand, art direction, and overall visual quality.

Representative

## Founder

Representative Member / Design Engineer

Günther Brunner

ブルンナー・グンタ

Our purpose

> Japan's creativity, finished, signed, and shipped to the world.

Günther is a design engineer who came to Japan in 2007 as a MEXT government scholar. He then spent 15 years building products at CyberAgent, Inc., a Tokyo Stock Exchange Prime-listed internet company. His open-source project OpenSTF has about 14,000 GitHub stars and is used by more than 200 organizations worldwide, including Netflix and Alibaba. His experience includes public-sector systems for Japan's National Tax Agency, JICA, and the Ministry of Internal Affairs and Communications, as well as AI product development. He is a permanent resident of Japan and works in Japanese (JLPT N1), English, and Spanish.

This is the founder's personal record, including work before the company was formed. Star count as of November 2026.

[guntherbrunner.com](https://guntherbrunner.com) [GitHub / @gunta](https://github.com/gunta) [OpenSTF](https://github.com/openstf/stf) [X / @gunta85](https://x.com/gunta85)

[Read our philosophy](https://g-productions.studio/en/philosophy)

- **Came to Japan as a MEXT scholar**: 2007
- **Building products at CyberAgent**: 15 yrs
- **GitHub stars on OpenSTF**: 13,900 +
- **Organizations using OpenSTF**: 200 +

Accountability

## People are accountable

We ask to be judged on the quality of what we deliver. To protect it, people and AI agents have clearly separated roles, and every stage of a project has its own review step.

Before anything is delivered, a person carries out the final review. People set the direction and are accountable for the result. The more AI is used in the work, the more important human review and accountability become.

Unit of work

## Estimates in person-months

Estimates and invoices itemize the work in person-months for each area of expertise, for example 0.5 person-months of design direction and 1.0 of frontend engineering.

Third-party costs a project needs, such as AI model and cloud usage, are explained and agreed in advance, then billed at cost. Invoices are issued as qualified invoices under Japan's invoice system.

Join

## Work with us

We work with contract specialists who want to own the quality of what ships. Roles and working arrangements are agreed for each project.

[See open roles](https://g-productions.studio/en/careers) [Talk to us](https://g-productions.studio/en/contact)