LL

Rebuild the obvious.

LL Inc. builds software and produces and streams video.

Get in touch

Services

Software development

We take on the whole path, from rethinking how the work is done to building and running the system.

Web and business systems

We build web apps, business systems and mobile apps, and rebuild systems already in use.

AI in daily work

We use generative AI to automate routine work such as answering inquiries, writing minutes and preparing documents, and we build in-house AI agent platforms.

Cloud design and migration

We design platforms on Cloudflare, Google Cloud and AWS, migrate existing environments and review running costs.

Servers and networks

We build and run servers and networks on your premises or in a data center: GPU servers that run LLMs without sending your data outside, monitoring, office networks, and automated PC setup (kitting).

Technical advisor

We help with technical decisions and the way your team builds software, from outside the team. We work with your staff through a few meetings a month and chat.

  • Choosing technology, deciding whether to rebuild a system or keep fixing it, and checking vendor estimates and proposals
  • Design and code reviews, CI setup, and bringing in AI coding tools with rules for using them
  • Security checks on dependencies, permissions and what is exposed to the public
  • Sitting in on engineering interviews (over 100 so far)
Research and development

We try and measure new technology in-house before using it in client work, such as how far local LLMs can go on older GPUs, how accurately AI agents make decisions, and low-latency live streaming, and feed what we learn back into development.

Video production and streaming

We run our own videos and streams, and use what we learn to support yours.

Video and channel operations

We produce videos and run streaming channels ourselves.

Stream operations and analytics

We automate stream preparation and collect stream and social media data automatically to improve the next stream.

Technology

Cloud
  • Cloudflare
  • Google Cloud
  • AWS
Languages
  • TypeScript
  • Go
  • Python
  • Rust
  • Dart (Flutter)
Generative AI
  • Claude
  • Codex
  • local LLMs (DeepSeek, GLM and others)

How we work

  1. Tell us

    Send what is bothering you through the form, just as it is.

  2. Sort it out

    We learn how your work runs today and decide what to build and what not to.

  3. Try it small

    We build the part that matters most first and check it in real use.

  4. Build and run

    We ship the production system and keep growing it together with you while it runs.

Company

Company name
LL Inc.
Founded
October 1, 2026
Address
3F Shinjuku Dai-nana Hayama Bldg., 1-36-2 Shinjuku, Shinjuku-ku, Tokyo 160-0022, Japan
Representative
Ryuta Mizuno, Representative Director
Business
Software development, video production and streaming
About the representative
2015
While still in high school, built business systems for real estate agencies and restaurants on his own. They spread by word of mouth to Tokyo, the Tokai region, Fukuoka and Hokkaido.
From 2020
Built cloud systems and fast launches at a Google Cloud partner company.
Certifications and awards
Has held six Google Cloud certifications. Three-time Google Cloud Partner Top Engineer. Google Open Source Peer Bonus (2023).
2026
Merged 3,048 pull requests in the six months up to October, building with generative AI. Founded LL Inc. in October.

Contact

Send us your work inquiries through this form.

We reply to this address. This form does not send an automatic reply.
Up to 2,000 characters.

We use what you send only to answer your inquiry. It is not stored in a database on this site. See our Privacy Policy for details.