Tech and AI help, in plain words.
I'm a freelance engineer in Tokyo. I help small businesses and international people working in Japan with everything from using AI day to day, to building websites and apps, to setting up and running servers. One person, start to finish.
Talk to me in English or Japanese. Consultations start at ¥10,000.
What I take care of
you → web / AI → serverWho I work with
You don't need an IT department. You need someone you can ask.
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You want to use AI but don't know where to start
We look at where your day goes, find the tasks AI can actually take off your plate, and set up only those. I help pick the tools and show your team how to use them.
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You run a small shop or company with no IT person
Website, bookings, customer lists, email, servers. Use me as the one contact for all of it.
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You're from abroad and doing business in Japan
Explain what you need in English. I can build for Japanese customers and handle bilingual sites at the same time.
Services and pricing
Prices are estimates and exclude consumption tax. You get a fixed quote after we talk, and quotes are free.
One-off call (60 min, online)
¥10,000"Is this possible?" "What would it cost?" Ask anything about AI, websites or servers.
Assessment and written plan
¥30,000 – ¥50,000I review how you work today and write up what to do, in what order, with costs and timelines.
Getting started with AI
¥50,000〜Set up ChatGPT or Claude, a hands-on session built around your work, and a set of ready-to-use prompts.
Automation and custom AI tools
¥150,000 – ¥500,000Turn repetitive work into a system: drafting replies to inquiries, producing documents, cleaning up data.
Website or landing page
¥150,000 – ¥400,000A site for your shop or company, in Japanese, English, or both.
Web apps and internal tools
¥500,000〜Bookings, customer records, inventory, internal tools. If an existing service already does the job, I'll tell you.
VPS server setup
¥50,000 – ¥150,000OS setup, SSL (https), automatic backups and monitoring, with written runbooks.
AWS and cloud setup or migration
¥200,000 – ¥800,000New infrastructure or moving off your current server, designed so the monthly cloud bill stays predictable.
Monthly support
¥15,000 – ¥50,000 / moUpdates, incident response, small fixes and questions. Hand off what we built and stop worrying about it.
Hosting and AI service fees are billed by those providers at cost and are not included above.
What I build with
My focus is the backend: systems that stay up and stay easy to change. Much of what I build is open source.
- Elixir / Erlang
- Gleam
- Rust
- Go
- TypeScript
- React
- Astro
- GraphQL
- PostgreSQL
- AWS
- Terraform
- Cloudflare
- Linux / VPS
- Claude / OpenAI API
- MCP
- mochiGleam A GraphQL engine for Gleam. The foundation layer for building APIs.
- noriGleam Generates server and frontend code from an OpenAPI spec.
- rippleRust A code analysis engine that maps what a change affects. AI agents can query it directly.
- sendupGo Publishes a web page to your own domain in seconds, running entirely on Cloudflare's free tier.
- pakku.nvimLua Checks third-party packages before installing them, as a defense against supply-chain attacks.
Past work
Since 2021 I've built web services and business systems for retail, automotive, education, NFT and ESG clients, covering requirements, development, infrastructure and operations. Client names are kept private.
- Lecture platform for a university AI lab2026 Built the student survey feature: creating, answering and tallying surveys, visibility and permissions, i18n, Excel export. TypeScript · Next.js · Scala · MySQL · AWS · GCP
- Gaming community platform (my own proposal)2024 – Finding teammates and teams, timelines, a Discord bot, five languages. I took it from proposal through build, launch, operations and finding users. Elixir · Phoenix · GraphQL · TanStack Start · PostgreSQL · Fly.io · Vercel
- Rebuilding an ordering system2025 – 2026 Built the business screens on top of a GraphQL API. TypeScript · Next.js · GraphQL
- Information portal for a car company2025 Front-end development for the portal. TypeScript · Next.js · Tailwind CSS
- Automated data batch jobs (project lead)2025 Scheduled batch jobs on AWS, built not to stop halfway. My first time leading the team: assigning work and tracking progress. TypeScript · AWS
- Document-checking add-in for Word2024 – 2025 Reads the structure of a document and reformats it to a set style. I built the logic and the UI. TypeScript · Next.js · Office.js
- NFT marketplace2022 – 2024 API and admin screens, testing and operations. Built the AWS environment with Terraform. Go · TypeScript · React · PostgreSQL · Terraform · AWS
- ESG data dashboard (SaaS)2022 API and front-end development, plus testing. TypeScript · AWS Amplify · DynamoDB
- Inventory system for a produce distributor2021 Feature work, operations and maintenance. Go · Vue · PostgreSQL · AWS
- New ticketing website2021 Owned the requirements for one of two subsystems on my own, and designed and built the shared modules. Ruby · MySQL · AWS
How it works
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1
Talk
Send me an email. We follow up with an online call.
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2
Quote
You get scope, price and timeline in writing. Saying no at this point costs nothing.
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3
Build
I share progress often, and you try things as they come together.
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4
Run
You get a walkthrough and written docs. Monthly support is there if you want it.
Questions
I know nothing about AI. Is that okay?
Yes. We don't start with AI. We start with what's tedious or slow in your work, and go from there.
Can we work in English?
Yes. Calls, messages and documentation can all be in English, Japanese, or a mix.
Is my project too small?
Probably not. I take one-hour calls, and small jobs like fixing part of a site or sorting out email delivery.
Where do we meet?
Online by default (Google Meet or Zoom). In-person in Tokyo is possible, just ask.
Can you work on something another developer built?
Yes. I review it first, then tell you what needs fixing and what it costs.
Tell me what you need.
Send the form and I'll reply by email. It's fine if you're not sure yet what to ask for.