Stop Juggling Tools. Start Running Your Business.

Reactor unifies accounting, projects, and performance into one bilingual platform—so Japanese SMEs can make faster decisions without the chaos.

See Reactor in Action

Built for Japan. Trusted by executives who need answers, not more spreadsheets.

Reactor is built for:

SMEs with 10–200 employees juggling multiple projects

Companies outgrowing Excel but overwhelmed by enterprise software

Executives tired of asking "What's our actual profitability?"

Teams managing 5+ client/project relationships simultaneously

Your Tools Are Fighting Each Other—And You're Stuck in the Middle

Financials live in Freee. Projects scatter across Excel, Slack, and email. When leadership asks "Are we profitable?"—you spend days hunting for answers.

Most management platforms were built for Silicon Valley, not Japan. That's why even profitable SMEs either drown in disconnected tools... or pay CPAs just to understand their own business.

Japanese SMEs use an average of 8.3 disconnected tools to manage operations. Reactor replaces most of them.

From Chaos to Clarity—in a Single Platform

Reactor unifies projects, financials, and relationships—so you can answer "Are we profitable?" in seconds, not days.

Before Reactor

Financials in Freee, projects in Excel, updates in Slack
Profitability visible only at month-end
Hours spent reconciling disconnected data

After Reactor

Unified Insight: Projects, costs, and KPIs in one dashboard
Built for Japan: Freee sync, ¥ formatting, JP date standards
Flexible Design: Workflows adapt to your business

Get Your Custom Demo

We adjusted pricing in real time—no more month-end surprises.

— Operations Director, 50-person consulting firm, Tokyo

Everything you need to manage smarter, not harder

💰 Know Your Numbers Before Month-End

See profitability by project, client, or department—updated live as work happens. No more waiting for your accountant's summary.

Real-time budgets and forecasts
Scenario planning and cost analysis
Automatic sync with Freee and bank accounts

📊 Fire Bad Clients (Or Fix Them)

Instantly see which relationships drain resources. Make data-backed decisions about pricing, scope, or next steps.

Track profitability per client, department, or project
Custom dashboards and KPI tracking
Simple time, cost, and resource reporting

🤝 Manage Every Relationship in One Place

Stop switching between tools to find client history, vendor contacts, or contractor details.

Centralized CRM for clients, vendors, and contractors
Track interactions and activities
Customize contact types and workflows

🧩 Adapts to How You Actually Work

Built for Japan from the ground up—not retrofitted or translated.

Bilingual interface (EN/JP)
Proper yen formatting and Japanese date options
Easy to extend with plugins and automations

Get Your Custom Demo

Built for Japan. Not Translated for It.

Reactor handles yen formatting, Japanese dates, and Freee integration natively—because it was designed here, not retrofitted.

While global platforms force you to bend your workflows to their system, Reactor adapts to how Japanese businesses actually operate.

That means no "hacks," no expensive consultants, and no wondering if next year's compliance update will break everything.

More than software. A partner in your transformation.

We don't just hand you a login. Fusion's bilingual team works with you from setup through adoption—customizing workflows, training staff, and optimizing performance over time.

Our goal is simple: your team feels confident and in control from day one.

Trusted by Leaders Who Demand Clarity

Before Reactor, we couldn't see project profitability until our CPA closed the books. Now we adjust pricing and resource allocation in real time.

— Operations Director, 50-person consulting firm, Tokyo

Reactor helped us see profitability in real time. We make faster, better decisions without waiting for monthly reports.

— Executive, Tokyo SME

No Forced Migration. No Surprise Fees.

Start with one department. Keep your existing tools until you're confident.

Our team handles data migration and trains your staff—at your pace.

See how Reactor can simplify your business

One platform. Total clarity. Built for Japan.

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Discover how Reactor can bring clarity and simplicity to your business.