Beyond one-of-a-kind

One of a kind. Built to last.

ONE-OFF is a Tokyo-based studio that puts AI at the centre of how a company works and grows. We redesign the organisation around it, build the social channels, websites and search content that carry it, and keep improving them — nothing we make is a one-off.

I

The name

One of a kind·Once only

ONE-OFF means one of a kind. It also means once only. The line through our name strikes out the second meaning: what we build for a company is unlike any other, and it keeps working long after the project ends.

The line is also a promise. We draw it through what has piled up over the years — routines, pages, assumptions — and bring out what makes a company remarkable now.

II

Services

Everything starts with AI. We put it at the centre of how a company works, then build the social channels, website and search that grow it — one team, from strategy to daily operation.

01

AI-centred organisation

We start with the organisation, not the tool. We map how your company works — sales, operations, marketing, reporting — and redesign it with AI at the centre. AI agents and automation take over the routine; people take over the judgement; the company keeps improving on its own.

  • AI strategy and organisation design
  • AI agents and automation for routine work — orders, ads, reporting
  • Workflows and training so your team runs it, not us

02

Social & advertising, AI-driven

Channels, ads and creative chosen and produced with AI, so the fastest route to your prospects is found quickly and kept open.

  • Social media management
  • Paid advertising and optimisation
  • AI-assisted image and video creative

03

Web design & development, AI-driven

Websites designed from data and built with AI: faster to produce, easier to update, and made to be measured and improved after launch rather than left as they were.

  • Site architecture, design and build
  • AI-assisted production and updates
  • Analytics and conversion tracking

04

SEO & content, AI-driven

AI reads the search data and drafts; people decide what is worth saying. Keywords, articles and pages are produced and refined continuously, with rankings and traffic measured every month.

  • Keyword strategy from search data
  • AI-assisted articles and pages, edited by people
  • Monthly ranking and traffic reports

III

How we work

Organisation first, then tools

Before building anything, we look at how the company works and where AI changes it. The tools follow the organisation, not the other way round.

Strike through, then build

We cut through what has accumulated over the years — routines, pages, assumptions — and draw out what makes the company remarkable now.

Never a one-off

Nothing we make ends at launch. Measurement and improvement are part of the system we hand over, so results compound instead of fading.

IV

Selected work

Across industries, the job has been the same: draw a line through what was holding a company back, and build something that keeps working.

  • E-commerce (Rakuten)
    Routine operations rebuilt around AI. Ad operations and other recurring work now run through AI agents and automation on the cloud, replacing tasks that used to be done by hand — and maintained as the business changes.
    Operations, automatedAd operations and other workflows run by AI agents
  • Interior construction company
    Corporate site relaunch and SEO, run with AI. An AI agent checks rankings and inquiries every day and proposes the next improvement; we review it and ship it.
    Build, then runSite build plus daily AI-driven measurement and improvement
  • Accounting firm
    Content marketing to win new consultations. Top rankings on specialist tax topics turned into a steady flow of inquiries.
    0 → 30 inquiries a monthNew engagements 1 → 10 a month; 7,000 monthly visits
  • Architecture & design studio
    Website and content SEO. The site ranks above major property portals and Google Maps, bringing prospects straight to the studio.
    20,000 monthly visitsDesign and construction requests arriving every month

Client names are withheld for confidentiality. Details on request.

V

Company

Company
ONE-OFF Inc. (ONE-OFF株式会社)
Representative
Yukihiro Yanase, Founder
Address
Kasumicho Corp #1002, 3-21-20 Nishiazabu, Minato-ku, Tokyo 106-0031, Japan
Business
AI-centred organisation design and automation / Social media and advertising / Website planning, design and operation / SEO and content

VI

Contact

Whether you want to rethink how your company works with AI at the centre, or build the channels and site that carry it — we're happy to talk, in English or Japanese. The button below opens an email to us.

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