Briswell Ltd. — Tokyo & Ho Chi Minh City

Enterprise Systems
Built to Last.
In the Age of AI.

We design, build and operate mission-critical business systems for mid-market and enterprise clients across Japan and the Asia-Pacific region — combining Japanese engineering discipline with Vietnam delivery scale.

Get in Touch
~20
Years in operation
2
Offices — Tokyo & HCMC
4
Core service lines
APAC
Regional focus

Company

Who We Are

Founded in Tokyo and now approaching two decades of operation, Briswell builds enterprise systems for clients across Japan and the Asia-Pacific region. We combine software engineering capability with a consulting-grade approach to requirements, architecture, and delivery.

Company Briswell Ltd.
Founded 2008
Headquarters Shibadaimon, Minato-ku, Tokyo, Japan
2F Shiba Eitaro Building, 1-4-14 Shibadaimon — accessible from Hamamatsucho, Daimon, and Onarimon stations
Subsidiary Briswell Vietnam Co., Ltd. — Ho Chi Minh City
Services Software Development & AI Integration · Cloud ERP “ai-cata” · AWS Implementation · Generative AI Products
Clients Telecommunications · Real estate · Distribution & wholesale · Manufacturing · Financial services · Healthcare · Retail

Mission & Values

Creating New Value Through Technology

Our mission is to harness technology to create meaningful value and contribute to a better-functioning society. Five core values guide everything we build and every engagement we take on.

01

Create New Value

We approach every project with the conviction that technology should produce genuinely new outcomes — not just automate the status quo.

02

Customer First

We deliver services that clients find indispensable, maintained with professional rigor throughout the full system lifecycle.

03

Quality and Speed

We pursue both without compromise. Quality without speed is too slow; speed without quality is too dangerous.

04

Team Spirit

Shared objectives and mutual understanding — across Tokyo, Ho Chi Minh City, and our clients’ organizations.

05

Leadership

We take ownership at every stage of a project. Trust is built through accountability, not assurance.

SINCE

2008

Operating through technology cycles — from on-premise to cloud, from cloud to AI agents — these values have remained constant.


Services

What We Build

Briswell operates across four interconnected service lines, each anchored in the same principle: operational systems must be reliable first, and innovative second.

Software Development & AI Integration

We design and build custom enterprise systems — from requirements definition through release — using an AI-augmented development model. Japan-side leads architecture and quality; Vietnam-side delivers implementation scale.

Cursor Claude Code Codex Gemini CodeRabbit TypeScript Node.js Python

Cloud ERP “ai-cata”

Our proprietary cloud ERP for mid-market companies. A semi-order platform that unifies procurement, sales, inventory, and management reporting — built from nearly two decades of frontline enterprise system experience.

Order management Inventory Billing KPI dashboard ai-cata.com

AWS Implementation & Operations

End-to-end cloud infrastructure design, build, and operations on Amazon Web Services — from initial architecture through ongoing monitoring and cost optimization.

ECS / Fargate Lambda RDS CDK Amplify S3

Generative AI Products

Proprietary AI products built for enterprise deployment: ai-borne X, ai-flow+, and AI Answer DAIRI — purpose-built tools that bring measurable operational efficiency without disrupting core business logic.

ai-borne X ai-flow+ AI Answer DAIRI RAG LLM integration

Our Approach

Governance Over Hype

As the industry moves from AI assistants toward Agentic AI — systems that plan, execute, and make operational decisions autonomously — the question of reliability becomes more consequential, not less.

Principle 01

Governance Before Capability

AI agents must operate within strict, documented business rules. In logistics, supply chain, and infrastructure environments, “black box” behavior is not acceptable. We define the boundaries before we expand them.

Principle 02

Predictable Architecture

We build on AWS to create stable, observable environments where AI capabilities enhance human decision-making without introducing fragility to core operations. Boring infrastructure is good infrastructure.

Principle 03

Disciplined Integration

Bridging modern AI interfaces with proven legacy logic requires judgment, not just engineering. We call this the “Japan Quality” approach to modernization — careful, thorough, and without surprises.

Operational systems are not the place for experimentation. As AI capabilities become integral to enterprise workflows, our focus remains on building systems where reliability and intelligence reinforce each other — not compete. That commitment has defined how Briswell operates since 2008, and it is more relevant now than ever.


Technology

Stack & Delivery Model

We maintain a modern, AI-augmented development environment and a dual-office delivery model that gives clients the governance discipline of Japan-side management with the scalability of Vietnam-side development.

Frontend
TypeScript · Nuxt.js · Next.js
Backend
Node.js · Python · PHP
Infrastructure
AWS — ECS, Lambda, Fargate, Amplify, RDS, S3, CDK
AI Tools
Cursor · Claude Code · Codex · Gemini · CodeRabbit · Playwright
Dev Environment
Docker · GitHub Actions · Notion · Slack

Japan–Vietnam Collaborative Delivery

Tokyo

Client-facing · Requirements & architecture · Code review · Quality assurance · Project governance

Ho Chi Minh City

Implementation · Unit testing · Continuous improvement · Scalable development capacity

Tokyo, HCMC, and major APAC cities operate within a closely overlapping business hours window — enabling real-time collaboration without the friction common to traditional offshore models.


Leadership

The Founders

Briswell is jointly led by its two co-founders. Together they oversee all aspects of the business — from client delivery and technology direction to product development and business growth.

Kiyoshi Yamaguchi
Kiyoshi Yamaguchi
Representative Director & CEO

Background in management consulting at Andersen Consulting (now Accenture), focused on enterprise system implementation for major electronics and telecommunications clients. Subsequently held an internal audit and ERP leadership role at Poppins Corporation before founding Briswell.

Yojiro Kato
Yojiro Kato
Director & Co-founder

Background in management consulting at Accenture Japan, focused on SCM, CRM/SFA, and large-scale system implementation for telecommunications and technology clients, including an offshore engagement in Manila. At Briswell, drives business development, IT consulting, and the ai-cata product line.


Why Briswell

The Case for Japan-Standard Engineering

For clients evaluating enterprise system partners in the Asia-Pacific region, the combination of Japanese management discipline and Vietnam development capacity represents a structural advantage — one that becomes particularly compelling in an era when AI capabilities demand more rigorous governance, not less.

Advantage 01

Tier-1 Governance, Optimized Cost

Consulting-grade management discipline applied to every project — at a cost structure that reflects our dual-office model. High-end stability without the traditional premium.

Advantage 02

Predictability as a Feature

We do not experiment with your operations. Every integration, migration, and AI deployment is governed by documented rules and validated against real business logic before it touches production.

Advantage 03

Full-Cycle Ownership

From requirements definition to post-launch operations, a single cohesive team owns the outcome. No handoffs between firms. No ambiguity about accountability.


Let’s Build Something That Lasts

Whether you are modernizing a legacy system, integrating AI into existing workflows, or building a new operational platform from the ground up — we are ready to discuss what reliable, disciplined delivery looks like for your organization.

Contact Us Explore ai-cata