Koyama EngineKoyama Engine
From AI to restaurants, we don't stick to one lane. We just want to be the partner right beside you the moment your business clicks into place.
What We Do
AI, blockchain, the latest tech — no need to overthink it. We're here to help shape your "wouldn't it be nice if..." into something real.
AI & Machine Learning
"Could AI actually help with our work?" That single question is exactly where we begin. From text generation, image recognition and demand forecasting to putting generative AI like ChatGPT and Claude to work — we help you weave it into your existing workflow so it fits naturally and delivers real results.
Blockchain & Web3
Smart contracts, DeFi, NFT marketplaces, decentralized apps (DApps) — the whole Web3 world. We won't just throw buzzwords at you. We start from "what can it do, and why does that matter to you," then turn it into something you can actually use.
Cloud & DevOps Consulting
From infrastructure on AWS, Azure and GCP to CI/CD, microservices and Kubernetes operations. It's the part nobody sees day to day — which is exactly why we design a foundation that stays up and scales with confidence.
System Development & DX
Building internal systems, streamlining the everyday grind, modernizing aging setups, figuring out how to actually do DX. We turn "the way we do this is kind of exhausting..." into something better, one step at a time, at a pace that never feels forced on the ground.
Web Development & Digital Marketing
Websites, apps and online stores built with modern tools like Next.js and React. We don't stop at launch — SEO, ad operations, and improvements guided by real data. We stay with you until it's genuinely used and genuinely selling.
Global Trade & Supply Chain
From overseas trade and inventory-flow management to origin and history traceability with blockchain. We take the tangle of cross-border work and tidy it up with the help of technology.
Restaurants & Food Tech
We run restaurants ourselves. That's why our food tech — AI-driven inventory, smoother reservations and ordering, more efficient delivery — comes from someone who genuinely knows the day-to-day of a busy kitchen.
Antiques & Digital Assets
Alongside handling secondhand goods under Japan's Antique Dealer Act, we work with NFT art, digital collections, and blockchain-based authenticity verification. We protect what things are worth — and carry it into the times ahead.
And any and all businesses incidental or related to the above.
Our Services
Every one of these we built with our own hands and run for real, every day. Have a look around — we'd love that.
RizaSalon
Salon Booking & Customer Growth
Booking management and customer growth for every kind of salon — hair, nails, lashes, esthetics and relaxation. "We can't keep up with the booking calls" "We'd love to meet new customers" — we make those daily moments simpler and lighter.
Real Estate Market Analysis
AI Valuation & Free Market Insights
"What's this home worth right now?" — built on roughly 4 million actual closed-deal records from Japan's land ministry, with price checks, forecasts and free valuations. Compare up to 6 firms in as little as 60 seconds, with no pushy sales calls. See the going rate across 1,900 municipalities and 5,100 stations, from a perspective that's genuinely good with numbers.
Mobile Order
The Zero-Fee Restaurant OS
Starting from your customers' phone and tablet orders, it brings customer acquisition, repeat business, and cost and profit management into one. Zero referral fees, first month free, open in 5 minutes. Lock in cash early with prepaid passes and subscriptions, while an AI management advisor makes your operating profit visible. Welcome regulars and newcomers straight into your own restaurant.
Life & Financial Planning
Neutral Money Check-up (Free, No Sign-up)
Just enter your household finances and assets to see a financial health score and future projections. Estimate everything from retirement funds and pensions to NISA/iDeCo and inheritance tax. Because it's a neutral diagnosis that doesn't rely on sales commissions, you can trust it. And when you need it, we connect you — with your consent — to tax accountants, judicial scriveners and other professionals.
WorkWell
Attendance & Labor Cloud for Trucking
Automatic checks against Japan's Improvement Standards (on-duty, rest, driving and continuous-driving time), plus roll-call and alcohol-check records, 36-Agreement compliance, transport payroll (commission-based), and vehicle and driver ledgers — all in one place. It quietly watches your back on the slip-ups that matter in trucking, and also ships with industry templates for healthcare, nursing care, construction and retail.
Travel Guide Matching
Travel Your Way, with a Local Guide
"On this trip, I'd love to go where only the locals go." A platform that connects those travelers with verified local guides. From tour search to custom-tour requests and messaging — plus flat-rate, door-to-door airport transfers from Narita and Haneda (parking and tolls included). Travel, a little freer.
About Us
Address
〒271-0091 21-2 Honcho, Matsudo City, Chiba Prefecture Toshi Sogo Kaihatsu Dai-3 Building, 3F, Room 1
Date of Incorporation
November 11, 2025 (Reiwa 7)
Director
Kim Doo Cheon