What Float Engineering does

Float Engineering (株式会社Float Engineering) is a one-person AI-native development studio incorporated in August 2023 and headquartered in Minato-ku, Tokyo, operating with ¥1,000,000 of self-funded registered capital. The company delivers website production, internal tool development, AI integration, and AI-prototype production-readiness services directly to small and mid-sized Japanese businesses, with the founder and sole representative (Nishibayashi Akinobu) personally handling every stage from initial consultation through delivery. Service pricing is published and transparent, starting at ¥100,000 for small web projects and ranging up to ¥1,200,000 for the Build (AIのあとしまつ) production-readiness plan, with a 6-week business validation program (LITMUS) and a performance-based SEO media service (Yobi Media, ¥10,000–¥20,000 per qualified lead) extending the offering into higher-value engagements. The company positions itself against large Japanese dev shops (¥2M+ quotes, multi-month cycles) and unreliable freelancers by eliminating all intermediary layers and operating at approximately one-fifth the cost.

The technical stack is built around Next.js, Vercel, Supabase, Tailwind CSS, and TypeScript, with AI coding tools (Cursor, Claude Code, Bolt, v0, Lovable) deployed as core productivity multipliers rather than supplementary aids. The founder simultaneously develops and operates more than 10 self-owned products — including Job Change DB, Calen, webmusic.app, my9books, maneguri, Supabase Risk Check, Lean Canvas, and Javelin Board — both as proof of the AI-accelerated solo methodology and as free lead-generation tools for client services. Distribution is entirely direct and content-led: an owned Japanese-language SEO blog (across three media domains totaling 150+ articles), free diagnostic tools, and a 45-minute online consultation booking flow drive all inbound demand, with no sales staff, PM layer, or marketplace intermediaries in the engagement model. The company's entire revenue is generated by a single individual, which defines both its cost advantage and its principal scalability ceiling.

Name

Float Engineering

Legal name

株式会社Float Engineering (Float Engineering Inc.)

Website

https://floatengineering.co.jp

Company type

Private

Founded year

2023

Operating status

Operating

Short description

Float Engineering is a one-person AI-native development studio in Tokyo that delivers website production, internal tools, AI integration, and AI-prototype production-readiness services directly to Japanese SMBs, pricing at roughly one-fifth traditional dev-shop rates by eliminating all intermediary layers.

Ownership category

akta.pro rank

Product category

Custom Software Development Services

NAICS

Engineering Services (54133)

akta.pro primary industry

DevOps, SRE & Platform Engineering Consulting (BPAHAEAK)

Keywords

• Web development services
• AI integration services
• Internal tool development
• Prototype code finishing
• Performance-based SEO media

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Web Development / Website Production: One-time project fees for corporate websites, landing pages, and site renovations. Pricing starts from ¥100,000 for small web projects. Representative directly handles requirements, design, and development.
2. Internal Tools Development: One-time development fees for bespoke internal tools and operational automation systems. Priced from ¥300,000. Representative builds end-to-end.
3. AI Integration / Consulting: Embedding AI capabilities into existing business processes and products — chatbots, document summarization, data analysis automation. Priced from ¥300,000.
4. AI Prototype Finishing (あとしまつ / Build): Post-prototype production-readiness service for AI-generated code. 'あとしまつ plan' ranges ¥500,000–¥1,200,000 covering code review, security hardening, refactoring, and deployment. 'Custom development plan' is quote-based.
5. LITMUS — New Business Validation Program: 6-week business hypothesis validation program combining market research, MVP development, and user testing. Pricing is custom-quoted per engagement scope.
6. ヨビメディ — Lead Generation Media (Yoobi Media): Fully performance-based SEO media construction service. Zero initial fee, zero monthly fixed fee. Clients pay ¥10,000–¥20,000 per qualified lead delivered. Media is built on client's own domain as client-owned SEO asset.
7. AI Consulting / Technical Advisory (月額顧問): Monthly retainer-based AI advisory service covering strategy design, tool selection, prototype validation, and team knowledge transfer. Priced based on scope and engagement level. Can transition to Build service for specific development needs.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Float Engineering is a solo AI-native development studio that delivers web production/renovation, bespoke internal tools and business automation, AI integration (chatbots, document summarization, data analysis), production-readiness finishing for AI-generated code, business hypothesis validation, and performance-based SEO media construction for Japanese SMBs. The representative personally handles all client consultations and development without sales or PM intermediaries, pricing services at approximately 1/5 the cost of traditional dev shops.

Product overview

Float Engineering operates as a one-person AI-native development studio offering both client services and a portfolio of proprietary self-service tools. Its core client services include: (1) Website Production and Renovation using Next.js/Vercel (starting 10万円), (2) Internal Tools and Business Process Automation (starting 30万円), (3) AI Integration and Embedding into existing workflows (starting 30万円), (4) Build (AIのあとしまつ) — a production-readiness finishing service for AI-generated code at 50-120万円, (5) LITMUS — a 6-week new venture hypothesis validation program with custom pricing, (6) ヨビメディ — a performance-based SEO media production service with zero upfront cost (1-2万円 per lead), and (7) Technical/AI Utilization Advisory on a monthly retainer. The proprietary self-service tool portfolio includes Supabase Risk Check (free security diagnostic), Lean Canvas and Javelin Board (free hypothesis validation tools), all accessible without engagement. The company's differentiation is a single founder handling the full cycle from consultation to delivery, with AI maximizing one developer's output across 10+ self-operated products.

Differentiator

Problem solved

Functional benefit

Brands

• Build (あとしまつ / AIのあとしまつ): AI生成コードを本番品質に仕上げるサービス。Cursor/Bolt/Lovable等のプロトタイプをセキュリティ・認証・本番インフラ対応にする「残り30%」を仕上げる。50〜120万円。
• LITMUS
• ヨビメディ (Yobimedia)
• 転職DB
• Calen
• webmusic.app
• my9books
• maneguri
• Supabase Risk Check
• Lean Canvas
• Javelin Board
• AI活用顧問 (Activate)

Products and services

• Website Production and Renovation Corporate websites, landing pages, and existing site renovations built with Next.js and Vercel. Starting from ¥100,000. Covers planning, design, development, and deployment with direct engagement from the representative.
• Internal Tools and Business Efficiency Custom-built management dashboards, data aggregation tools, and workflow automation solutions replacing spreadsheet-based processes. Starting from ¥300,000.
• AI Integration and Embedding Integrating AI capabilities such as chatbots, document summarization, and data analysis automation into existing business workflows and products. Starting from ¥300,000.
• Build (AIのあとしまつ) — AI Code Production-Readiness Service

Quantifiable outcome

• Development cost reduced to 1/5 compared to traditional dev shops (no intermediary margin from sales/PM layers)
• +4 more outcomes

Named customers1 record

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability9 records

Feature4 records

Scale indicators5 records

Recent moves6 records

Expansion highlights6 records

Broad incumbents

• PKSHA Technology: A Japanese AI/ML company offering machine learning and natural language processing solutions. Overlaps with Float Engineering's AI integration service line but serves larger enterprise clients with platform-based offerings.
• AI Inside: A Japanese AI company focused on OCR and AI platforms. Operates broadly in the enterprise AI space where Float Engineering's AI integration and consulting services compete, but at significantly larger scale and with proprietary AI products.
• Goodpatch: A Japanese design and digital product studio operating at much larger scale. Comparable to Float Engineering's web/digital services line but with a broader portfolio including enterprise UX design and a publicly listed presence.

Direct peers

• NEXER: A Japanese web development and digital marketing firm serving SMEs and mid-market. Similar service mix (web production, system development) but with significantly larger headcount and broader service portfolio.
• Basic Inc: A Japanese creative technology studio offering web production, system development, and digital services. Operates in the same SME/mid-market segment with comparable full-stack web development capabilities.

Others

• Lancers: Japan's largest freelance matching platform. Competes for the same SME client budget as Float Engineering but through a marketplace model rather than direct engagement — an alternative the company explicitly positions against.
• CrowdWorks: Japan's leading crowdsourcing platform for freelance development and content work. Competes for similar Japanese SME clients seeking cost-effective development, but through distributed freelancers rather than a dedicated studio.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat5 records

Key risks6 records

Key highlights6 records

Customer concentration

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Float Engineering