Sui

What Sui does

株式会社SUI is a Tokyo-based, privately held digital marketing agency founded in December 2016 by Representative Director Takeshi Kataoka. The company operates with a lean team of approximately 8 staff including contractors and runs two business segments: a Web Marketing Support Services arm offering content marketing, web/landing page production, SEO, and internet advertising operations to Japanese SMEs and mid-market companies; and a Social Marketing Services arm comprising the owned-media brand Socrates' Egg (ソクラテスのたまご), an expert-contributed parenting/education platform, and the Sokutama Consultation Room (ソクたま相談室), an online consultation service connecting parents to 100+ vetted professionals at 3,500 yen per 50-minute session.

The company's core technology stack is conventional digital marketing infrastructure — content management, SEO tooling, advertising analytics across Google, Yahoo!, and social platforms, DSP/native/affiliate channels, and CRM. SUI monetizes primarily through project-based and retainer professional services engagements with mid-market enterprises (logos include DAZN × au via madiba, ONE COMPATH/Shufoo!, SBIマネープラザ, iYell, パールフーズ, and 廣済堂ビジネスサポート), supplemented by pay-per-session revenue from the consumer consultation product and an emerging B2B2C distribution channel via E-WELL's WELBOX welfare platform reaching 12 million corporate members.

SUI is bootstrapped, with no external venture funding, no subsidiaries, and no disclosed revenue. Geographic scope is exclusively Japan. The strategic trajectory since 2023 has shifted from a pure B2B agency toward a hybrid model that builds owned consumer media and consultation products in the parenting/education vertical — an attempt to diversify beyond project-services dependence and leverage an expert network that the firm positions as its core differentiator.

Name

Sui

Legal name

株式会社SUI

Website

https://sui.co.jp

Company type

Private

Founded year

2016

Operating status

Operating

Headcount range

1–10 employees

Short description

SUI is a Tokyo-based, bootstrapped digital marketing agency serving Japanese SMEs and mid-market companies with content marketing, SEO, web/landing-page production, and advertising operations, and operating owned parenting/education media plus an online expert consultation service.

Ownership category

akta.pro rank

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2B

Offering type

Services

Cost components

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

Revenue model

1. Web Marketing Support Services: Project-based and retainer-based digital marketing services including content marketing, web production, SEO, advertising operations, and CRM consulting for mid-market and SME clients.
2. Media Operations: Self-operated parenting/education media platforms ('ソクラテスのたまご' and 'ソクたま相談室') generating revenue through consulting service bookings and potentially advertising.

Pricing tiers

Go-to-market motion1 record

Distribution channels3 records

Marketing channels5 records

Core offering

Sui (株式会社SUI) is a Tokyo-based marketing agency that provides comprehensive digital marketing support services including content marketing, web production, SEO optimization, and internet advertising operations for mid-market and SME clients in Japan. The company also operates social marketing services through owned media brands—Socrates' Egg (ソクラテスのたまご), a parenting/education content platform, and Sokutama Consultation Room (ソクたま相談室), an online expert consultation service connecting parents with 100+ specialists.

Product overview

株式会社SUI operates as a marketing company offering two core business segments: Web Marketing Support Services (Webマーケティング支援事業) and Social Marketing Services (ソーシャルマーケティング事業). The Web Marketing Support Services encompass content marketing, web production and operation, and internet advertising services. The Social Marketing Services include operation of owned media brands such as Socrates' Egg (ソクラテスのたまご), an education media platform, and Sokutama Consultation Room (ソクたま相談室), an online expert consultation service. Together, these products and services provide comprehensive marketing solutions for small and medium enterprises while addressing social issues, particularly in the parenting and education sector.

Differentiator

Problem solved

Functional benefit

Brands

• ソクラテスのたまご (Socrates no Tamago): An education media platform for adults exploring what constitutes good education for children, providing information on education administration, modern learning methods, school systems, and child psychology through expert contributions.
• ソクたま相談室 (Sokutama Sodan)

Products and services

• Web Marketing Support Services (Webマーケティング支援事業) Comprehensive digital marketing service covering marketing strategy, promotional operations, and creative production for mid-market and SME clients seeking sustainable business growth. Includes research and analysis, strategy planning, and execution support.
• Social Marketing Services (ソーシャルマーケティング事業) Marketing service focused on achieving both corporate revenue and social value by addressing social issues through company-operated media and services, particularly in the parenting and education sector.
• Socrates' Egg (ソクラテスのたまご) Self-operated education media platform for parents exploring what constitutes quality education for children. Provides practical information on educational systems, modern learning methods, schools, teachers, and child psychology through expert collaboration.
• Sokutama Consultation Room (ソクたま相談室) Online consultation service for parenting and education concerns, connecting users with over 100 carefully selected experts including doctors, psychologists, school counselors, financial planners, and administrative scriveners for 50-minute sessions starting from 3,500 yen.

Quantifiable outcome

• Client inquiries increased 10x+ for some B2B clients after implementing content marketing strategies
• +1 more outcomes

Named customers8 records

Segments2 records

Ideal customer profiles2 records

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

One partnership is on record.

• イーウェル (E-WELL)coreChannel Partner/ Reseller/ DistributorSUI partnered with E-WELL to offer the 'ソクたま相談室' (Sokutama Counseling Room) online parenting consultation service as a benefit within E-WELL's WELBOX employee welfare platform, reaching 12 million members.

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Direct peers

• Ferret (Basic Inc. / ベーシック): Operates ferret.jp, a leading Japanese B2B content-marketing media, and provides content marketing, SEO, and web production services to SMEs and mid-market firms — directly comparable to Sui's content marketing, SEO, and web production offerings for the same buyer persona.
• CInc. (シーインク): Japanese digital marketing agency specializing in SEO and content marketing with proprietary production methodologies — closely comparable to Sui's content marketing support and SEO services targeting mid-market Japanese clients.
• Soul'd Out (ソウルドアウト): Publicly listed digital marketing support company focused on SMEs and regional businesses with comprehensive digital services — the closest public-market comparable to Sui's 中堅・中小企業 positioning and integrated service portfolio.
• Repro Inc. Tokyo-based marketing customer experience / automation platform that provides marketing analytics, CRM, and engagement tooling — comparable to Sui's CRM consulting and marketing operations services for SME/mid-market accounts.
• Kaizen Platform: Japanese digital marketing optimization firm focused on CRO, UX, and marketing consulting — directly comparable to Sui's landing-page/CVR optimization work and broader consulting engagements.
• AUN Consulting (アウンコンサルティング): Public Japanese SEO and digital marketing consulting firm with multilingual/multinational capabilities — comparable in SEO, content marketing, and brand-related digital services targeting Japanese enterprises.

Broad incumbents

• Digital Holdings (formerly Septeni Holdings): One of Japan's largest digital advertising and marketing groups offering full-service creative, media, and data capabilities — overlapping in industry vertical but operating at much larger scale and a broader portfolio than Sui's boutique agency.
• FreakOut Holdings: Public Japanese ad-tech holding company with proprietary DSP and integrated digital marketing solutions — comparable on the programmatic/paid media side but much larger and more diversified than Sui.
• i-mobile: Major Japanese mobile ad network and digital marketing platform serving advertisers and app developers — comparable in digital ad operations but at significantly larger scale than Sui's 8-person team.

Others

• HUGKUM (Benesse Corporation): Major Japanese parenting/education media brand operated by Benesse, a household-name education publisher — audience and vertical overlap with Sui's Socrates' Egg and Sokutama platforms, but operates as a publisher rather than a marketing agency.

Market position

Strengths4 records

Weaknesses5 records

Competitive moat4 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 Sui