コサギ株式会社KOSAGI K.K.

Services

Contract Development

Scope changes with the depth of the project. Wherever you start, the same team handles design, development and operations.

01

Corporate and documentation sites

Delivered with the CMS in place, so your team can keep it up to date.

Deliverables

Multilingual site / CMS integration / operating manual

For

Companies needing multiple languages and continuous updates

02

E-commerce (Shopify, headless)

A headless build that keeps page speed without giving up design freedom.

Deliverables

Hydrogen storefront / migration / operations

For

Merchants who have outgrown theme constraints

03

Portals and lightweight SaaS

From content modelling through to an admin your operators can actually run.

Deliverables

Multiple content types / multilingual / admin UI

For

Services handling several content types in several languages

04

SaaS platforms

API, authentication, billing and documentation as one set.The same architecture we run for our own product.

Deliverables

API / auth / billing / documentation

For

Businesses shipping a product they will keep operating

05

AI applications

We build MCP servers and agent infrastructure.

Deliverables

MCP servers / agent infrastructure

For

Companies embedding LLMs into their operations

Pricing is quoted per project — ask us through the contact form.

AI Adoption Support

What we do

  • Mapping your workflows and isolating the steps where AI pays off
  • Tool selection and proof of concept
  • Rollout and in-house adoption
  • Setting up your own devices and training you on real work — in person while you're in Japan
  • Building it into your systems ourselves→ see level 05

Token Service

LLM APIs supplied on Japanese domestic contracting and billing terms, with metered pricing and a usage dashboard.

Go to the service site

Sign-up, pricing and terms live on the dedicated site

External site · opens in a new window

Talk to us about your website or application

An engineer answers directly. Early-stage questions are welcome.

Get in touch