LLM development · Tokyo
LLM development company in Tokyo
Detailed specifications, careful testing and reliable schedules, with a team overlapping most of your afternoon.
Clarigo Infotech is an LLM development company that builds custom applications on large language models such as OpenAI GPT, Anthropic Claude, Google Gemini and open-source models like Llama. We design the prompts, retrieval, tools and guardrails, connect the model to your data and systems, and run it in production with monitoring, evaluation and cost control.
Japanese companies most often hire us for AI automation, enterprise systems and mobile apps.
10+
Years of delivery
600+
Projects delivered
20+
Countries served
25-30
Days to a live MVP
Get a free consultation
Tell us what you need. A senior engineer replies within one working day.
Quality, detail and reliability
Teams in Japan and Korea expect precise specifications, thorough testing and schedules that hold. We plan in detail, report regularly and treat quality as non-negotiable.
Detailed specifications
Written requirements, screen specifications and acceptance criteria agreed before development.
Thorough testing
Automated and manual testing with reports at every milestone.
Reliable schedules
Realistic plans, regular written progress reports and early warning of any risk.
Long-term partnership
The same team maintains and improves the product after launch.
What we build with LLMs
Custom LLM applications
Assistants, copilots and internal tools built around your workflows, not a generic chat window.
LLM integration
Add GPT, Claude or Gemini to your existing product through secure, well-tested APIs.
Open-source and private models
Deploy Llama and other open models on your own cloud when data must stay in-house.
Fine-tuning and evaluation
Tune models on your examples and measure accuracy with test sets before and after launch.
Guardrails and safety
Input and output filtering, PII masking, grounding checks and human review where needed.
Cost and latency optimisation
Model routing, caching and prompt design that keep responses fast and bills predictable.
How we approach LLM development
Choosing the right model
There is no single best model. We compare OpenAI, Claude, Gemini and open-source options on your real tasks for accuracy, speed, cost and data handling, and design the app so the model can be swapped later without a rewrite.
Grounded in your data
Most business value comes from connecting the model to your documents, databases and tools. We use retrieval (RAG), function calling and agents so answers come from your information and actions happen in your systems.
Built for production, not demos
We add evaluation test sets, logging, monitoring, rate limits, fallbacks and cost alerts from day one, so the app keeps working well after launch and you can see exactly what it is doing.
Security and compliance
Data minimisation, encryption, access control and providers configured not to train on your data. For healthcare we build to HIPAA requirements with BAAs in place for any service that touches PHI.
Remote, but close to Tokyo
Time-zone overlap
Japan is three and a half hours ahead of India, so our working days overlap for most of your afternoon, with a stand-up and same-day replies.
Japan's Act on the Protection of Personal Information (APPI)
We design to the APPI: clear purpose of use, security controls, rules for third-party and cross-border transfers, and data hosted in Japanese cloud regions when required. We sign NDAs before work starts.
Billing
Invoices in Japanese yen (JPY) or US dollars. Typical senior rates are $25 to $49 (USD) per hour, or a fixed price for a defined scope.
Where we help Tokyo businesses most
Tokyo companies work with us on AI automation, enterprise systems and mobile apps, with detailed specifications, thorough testing and regular written reports.
Automotive
Carmakers invest in connected-car software and factory automation. We start with one costly process and automate it end to end.
Electronics and robotics
Hardware makers need companion apps and embedded AI. We build AI agents, assistants and automation around these workflows.
Gaming and anime
Entertainment firms reach global fans through apps and stores. AI here usually means faster reporting, fewer manual steps and better customer replies.
Retail and convenience
Chains run loyalty apps and cashless checkout. We start with one costly process and automate it end to end.
Meetings in your time zone
Our team's hours, in Tokyo time
13:30–23:00
Monday to Friday
Overlap with your working day
13:30–18:00
About 4.5 hours every day
Daily stand-up
14:00
Tokyo time, plus written updates every evening
Local platforms and setup
Messaging channels
Languages
Local payments
Data hosting
AWS Asia Pacific (Tokyo, Osaka) and Google Cloud asia-northeast1 (Tokyo), in your own cloud account, so data stays where your rules require.
How it works
Week 1: discovery and design
We agree the use case, success measures and data, and show you a clickable design.
Weeks 2-3: build and integrate
We build, connect it to your systems and data, and demo working software every week.
Week 4: test and launch
We test with real cases, add monitoring and guardrails, then go live.
After launch: improve and scale
The same engineers keep tuning quality, cost and features as usage grows.
See what we've built
Try it yourself, free
Free browser tools from our team. No sign-up needed.
LLM development company: questions from Tokyo
Do you work with companies in Tokyo?+
Yes. Clarigo Infotech works with companies across Tokyo, including Tokyo, Yokohama, Kawasaki, as part of clients in 20+ countries. Japanese companies most often hire us for AI automation, enterprise systems and mobile apps. We work remotely from India with one in-house team.
What time-zone overlap do we get from Tokyo?+
Japan is three and a half hours ahead of India, so our working days overlap for most of your afternoon, with a stand-up and same-day replies.
How do you handle Japan's Act on the Protection of Personal Information (APPI)?+
We design to the APPI: clear purpose of use, security controls, rules for third-party and cross-border transfers, and data hosted in Japanese cloud regions when required. We sign NDAs before work starts.
Which currency do you bill in, and what does it cost?+
We bill in Japanese yen (JPY) or US dollars. Senior engineers typically cost $25 to $49 (USD) per hour, and fixed-scope projects such as an MVP in 25 to 30 days are quoted after a free consultation.
What time are your meetings in Tokyo time?+
Our team works 13:30–23:00 Tokyo time, so we overlap with your day from 13:30–18:00. Daily stand-ups are usually at 14:00 your time.
Can you build in Japanese and English?+
Yes. We build interfaces and content in Japanese and English, and test them with native speakers before launch.
Where will our data be hosted?+
Usually in AWS Asia Pacific (Tokyo, Osaka) and Google Cloud asia-northeast1 (Tokyo), or wherever your data rules require. Everything runs in your own cloud account, so you stay in control.
What does an LLM development company do?+
An LLM development company designs, builds and runs applications powered by large language models: assistants, copilots, document processing, search and agents. Clarigo Infotech handles model choice, prompts, retrieval, integrations, guardrails, testing and production monitoring.
Which LLM should we use: GPT, Claude, Gemini or open source?+
It depends on your task, data rules and budget. We test the options on your real examples and recommend the best fit, and we build so you can switch models later.
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