SERVICES

What We Build
— and How We Build It

From full-stack applications to cloud infrastructure and AI integration — all delivered with senior-level precision and full transparency.

Start a Project See Our Process

CAPABILITIES

Everything You Need Under One Team

No handoffs between agencies. One team owns the full stack from database to deployment.

Web Development

Full-stack web applications built with modern frameworks. React, Next.js, Astro, Vue — we choose the right tool for your users.

ReactNext.jsAstroTypeScriptPostgreSQL
¥800,000/ starting
Mobile Development

Native iOS, Android, and cross-platform apps with React Native or Flutter. From MVP to App Store in weeks, not quarters.

React NativeFlutterSwiftKotlinFirebase
¥1,200,000/ starting
Cloud & Infrastructure

AWS, GCP, Azure architecture design, migration, and management. Infrastructure as code, CI/CD pipelines, container orchestration.

AWSDockerKubernetesTerraformGitHub Actions
¥600,000/ starting
AI Integration

LLM fine-tuning, RAG pipelines, custom AI agents, and embedding systems. Pragmatic AI that actually ships and generates ROI.

OpenAILangChainPythonVector DBsFastAPI
¥900,000/ starting
Security Auditing

OWASP-based penetration testing, code reviews, JWT / OAuth audits, and hardening reports with remediation steps included.

OWASPPentestJWTOAuthSSL/TLS
¥400,000/ per audit
Technical Consulting

Architecture reviews, CTO-for-hire, team upskilling, and roadmap planning. Senior perspective without the full-time headcount.

ArchitectureCode ReviewRoadmapMentoring
¥60,000/ per day

PROCESS

How Every Project Runs

The same disciplined process on every engagement — no matter the size.

01
Discovery Call

A focused 60-minute session to understand your goals, constraints, and timeline. No sales — just honest technical conversation.

02
Scoping & Proposal

We write a clear scope document with deliverables, milestones, and fixed pricing. You know exactly what you are paying for.

03
Build & Iterate

Weekly demos, async updates, and a staging environment you can access anytime. No black boxes.

04
Deploy & Handover

Production deploy, documentation, and a handover session so your team owns the system — not just us.

05
Support & Growth

Ongoing retainer options, SLA-backed support, and a dedicated Slack channel for fast-response issues post-launch.

WHY REIWA SAKURA

Not Just Another Agency

Senior-only team

Every engineer has 5+ years of production experience. No juniors on client work. No outsourcing to cut costs.

Fixed-price scoping

We give you a firm price before writing a single line. No scope creep surprises. Milestones and deliverables in writing.

You own everything

Full source code, full IP, full documentation. When the project ends you have everything — no vendor lock-in.

Async-first communication

Weekly written updates, always-accessible staging, and a shared workspace. No waiting for status calls to know what's happening.

No sales team

You talk directly to the engineers building your product. No account managers, no miscommunication layer.

Post-launch support

Every project includes 30 days of free bug-fix support. Retainer plans available for ongoing feature development.

READY TO START?

Every project starts with a conversation.

No sales pitch. No NDAs before hello. Just an honest technical discussion about what you need.

Get in Touch View Pricing