Rejoice Software logo

AI · Asia

AI Development in Japan.

Ship real AI features — chatbots, agents, RAG and workflow automation.

From LLM proofs-of-concept to production agents, we integrate OpenAI, Claude, Gemini, and local models with grounded retrieval and evaluation. We serve clients across Japan with JST overlap and invoicing in JPY when required.

Why teams in Japan choose us

Local pace, global craft

  • JST timezone overlap for daily standups and reviews.
  • Invoicing in JPY or USD.
  • Signed mutual NDA before discovery — happy to use yours.
  • Data-residency and GDPR / equivalent-jurisdiction awareness built-in.
  • References from Asia-based clients available on request.

Engagement

Timeline
2–12 weeks
Investment
Starts at $4,800 pilot
Working hours
JST overlap
Currency
JPY / USD

What you'll get

A AI Development team, tuned for Japan.

✓

RAG over your knowledge base

✓

AI agents (function calling, tools)

✓

MCP servers

✓

Voice AI, OCR, vision

✓

Evaluation & guardrails

✓

Cost & latency optimization

FAQ

AI Development in Japan — common questions

Do you invoice in JPY? +

Yes. We can invoice in JPY, USD, or EUR — whichever your finance team prefers. All prices are quoted excluding local tax; we can register for tax purposes where required.

What are your working hours for clients in Japan? +

Our core hours have a minimum of 3–4 hours of overlap with JST. For fast-moving projects we run daily standups scheduled at your team's convenience.

Can you sign an NDA before discovery? +

Always. We sign mutual NDAs before any technical discovery. We're happy to use your standard template or provide ours.

Do you work with Japan-based agencies as a white-label partner? +

Yes. We frequently partner with local agencies as a technical execution arm — under your brand, with your project management.

How do you handle data residency and privacy laws in Japan? +

We design each engagement around the applicable regime (GDPR, CCPA, DPDP, POPIA, etc.). Data lives in the jurisdiction you require, and we build with those constraints from day one.

Let's talk

Let's build something worth talking about.

Free 30-minute strategy call. No pitch, no obligation — just a plan.

Start a project