What STK does

STK (株式会社STK) is a Tokyo-based private company founded in April 2009 that operates an integrated "REAL × WEB" marketing services platform. The company serves three primary customer groups: amateur sports event organizers and participants (via STK Photo Service and Phocket), Japanese SMEs and enterprises seeking integrated digital marketing and creative services (web marketing, promotion, advertising operations), and tourists/locals in Okinawa (via OCEAN'S SEVEN diving shop). Its product portfolio centers on internet photo sales for sports and kids events through a proprietary Phocket platform with custom-domain capability, the KAKERU sports portal launched in December 2025, web marketing and advertising operations with JICDAQ-certified brand safety controls, nationwide event photography/videography services, and physical promotion/event production.

The company's technology stack includes a proprietary web photo sales platform (Phocket) supporting 200+ sports events annually across Japan, an ad quality management system combining CODA, IHC, and third-party ad verification blocklists for IVT and brand safety management, and JICDAQ third-party certification obtained in April 2026. Contract photographers operate nationwide on a 12,000-100,000 JPY daily rate basis, and the firm holds Google Ads, Yahoo! Ads, and Facebook/Instagram platform certifications.

STK generates revenue through transaction fees (online photo sales, diving services), professional services fees (web consulting, creative production, SEO, SNS marketing, advertising operations, event promotion, photography/videography dispatch), and advertising (KAKERU sports portal). Distribution combines direct enterprise sales for B2B marketing services, a self-serve online platform for individual photo purchases, and a physical retail storefront for diving services in Naha, Okinawa. The company is led by CEO Ito Takuya (伊藤 巧也) since founding, maintains a lean 1-10 employee structure, and operates with undisclosed ownership (described as a privately-held independent company).

Name

STK

Legal name

株式会社STK

Website

https://stk-i.co.jp

Company type

Private

Founded year

2009

Operating status

Operating

Headcount range

1–10 employees

Short description

STK (株式会社STK) is a Tokyo-based private marketing services company founded in 2009 that provides integrated "REAL × WEB" solutions spanning online sports event photo sales (STK Photo Service, Phocket), web marketing/advertising, event promotion, photography/videography, and a KAKERU sports portal, serving sports event organizers, Japanese SMEs, enterprise clients, and Okinawa diving consumers.

Ownership category

akta.pro rank

Product category

Integrated Marketing Services

NAICS

Advertising Agencies (541810), Media Buying Agencies (54183), Advertising, Public Relations, and Related Services (5418)

SIC

Services-Advertising (7310), Services-Advertising Agencies (7311)

akta.pro primary industry

Supply-Side Platforms (SSP) & Publisher Monetization (BPAMALAC)

Keywords

• Digital marketing services
• Event photography
• Online photo sales
• Sports event marketing
• Web advertising

Headquarters

HQ city

Tokyo

HQ country

Japan

HQ region

Asia

Offices3 records

Markets served

GTM type

B2B and B2C

Offering type

Services

Cost components

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

Revenue model

1. Internet Photo Sales (STK Photo Service): Online photo sales service for sports events and kids events where participants view and purchase photos. Revenue generated from photo transactions.
2. Web Marketing Services: Web consulting, creative services, SEO, SNS marketing, and advertising campaign management for business clients.
3. Promotion Services: Event planning, production, and operation services including booth setup, corporate events, and promotional campaigns.
4. Movie & Photo Production: Photography and videography services including cameraman dispatch, studio shoots, and video production for various events and corporate needs.
5. Diving Services (OCEAN'S SEVEN): Diving tours, snorkeling, PADI license courses, and fun diving experiences for tourists and locals in Okinawa.
6. Media Business (KAKERU): Sports portal site providing information to runners and sports participants, with information provision and synergy with photo sales services.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels5 records

Core offering

STK provides integrated REAL × WEB marketing services combining digital advertising operations (Google, Yahoo!, Meta, YouTube/DSP), creative production, web development, and SEO/SNS marketing with physical event promotion, photography, and video production for Japanese corporate clients. The company also operates consumer-facing services including the STK Photo Service online platform (covering 200+ sports events annually with the proprietary Phocket system), the KAKERU sports media portal, and the OCEAN'S SEVEN diving shop in Okinawa.

Product overview

STK operates as a multi-service company organized around REAL × WEB convergence strategy. The core product portfolio includes STK Photo Service (internet photo sales for sports events and kids events via proprietary Phocket system), KAKERU sports portal media platform, and comprehensive web marketing services. Supporting REAL-side services include Movie & PHOTO (nationwide photography/videography), Promotion (event and marketing production), and Marine business (OCEAN'S SEVEN diving shop in Okinawa). The company also maintains an advertising business with JICDAQ certification for brand safety and invalid traffic countermeasures. All services can be cross-utilized for integrated client solutions.

Differentiator

Problem solved

Functional benefit

Brands

• STK Photo Service: 全国での撮影対応可能なスポーツ大会向けのWEB写真販売サービス。
• KAKERU
• OCEAN'S SEVEN
• Phocket

Products and services

• STK Photo Service Nationwide web photo sales service for amateur sports events, covering 200+ marathons, running events, and sports competitions across Japan, including Itabashi City Marathon, Shonan Fujisawa Citizen Marathon, Tohoku Miyagi Reconstruction Marathon, Kobe Valentine Love Run, and Ibikawa Marathon. Participants browse and purchase professional event photos online.
• KAKERU (かける) Sports Portal Sports-specialized portal site that connects runners and sports participants with event information, announcements, and promotional content, integrated with the STK Photo Service for event participants.
• Phocket (Phochet) Kids Photo Sales Proprietary photo sales system for kids events and ceremonies (entrance ceremonies, graduation ceremonies, sports days, performances, kindergarten, school, and travel events). Enables parents to view and purchase professionally photographed images, with customization options including custom-domain operation for client branding.
• Web Marketing Services Integrated digital marketing services combining creative production with advertising operations for Japanese businesses. Includes owned media management, paid advertising on Google Ads (search, display), Yahoo! Japan Ads, Facebook/Instagram, YouTube, and DSPs, plus SEO optimization and SNS marketing with transparent account management and shared access to ad dashboards.
• Movie & PHOTO Services Comprehensive photography and videography services covering all genres nationwide via a cameraman dispatch network. Includes cameraman dispatch for events, seminars, and trade shows; studio shoots; video production from commercials to corporate videos; and overseas assignment coverage.
• Promotion Services Total promotion coordination including planning, production, and operations for advertising, sales promotion, events, media arrangements, web, graphics, TV/Radio commercials, and POP materials. Uses in-house designers and photography staff and has executed influencer arrangement campaigns reaching 1 million followers.
• OCEAN'S SEVEN (Diving Shop) Beginner-focused diving shop in Okinawa (Naha) offering small-group snorkeling, trial diving, PADI license courses, and fun dives, with hotel pickup from the Naha area. Targets customers without diving experience or licenses.
• Advertising Business (JICDAQ Certified) Digital advertising operations emphasizing transparency and quality. Operates an ad quality management system using CODA, IHC, and ad verification provider blocklists for invalid traffic countermeasures and brand safety, compliant with JIAA guidelines and JICDAQ certified in Brand Safety and Invalid Traffic Countermeasures (April 2026).

Quantifiable outcome

• 200+ sports events covered annually
• +1 more outcomes

Named customers10 records

Segments5 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration2 records

Feature3 records

Partnerships

Six partnerships are on record, tiered core.

• 、一般社団法人の日本インタラクティブ広告協会（JIAA）coreStrategic or Co-development Partner · 1 December 2025STK joined JIAA to comply with advertising guidelines and industry standards set by the association, establishing a more transparent and trustworthy advertising operation system. The company will utilize JIAA knowledge, training, and guidelines for internal education and quality management.
• CODA（CODE OF DIGITAL ADVERTISING OPERATIONS）coreTechnology or IntegrationUtilized for IVT (Invalid Traffic) and brand safety management through blocklists obtained from CODA.
• IHC（Internet Hotline Center Japan）coreTechnology or IntegrationUtilized for IVT and brand safety management through blocklists obtained from IHC.
• Google広告（リスティング、ディスプレイ）coreTechnology or IntegrationGoogle Ads platform for search and display advertising services with certified staff expertise.
• Yahoo!広告（リスティング、ディスプレイ）coreTechnology or IntegrationYahoo! Japan Ads platform for search and display advertising services.
• Facebook / Instagram広告coreTechnology or IntegrationMeta advertising platform with certified staff expertise for social media advertising services.

Scale indicators3 records

Recent moves6 records

Expansion highlights6 records

Direct peers

• IREP: Japanese digital marketing holding company offering SEO, advertising, and creative services. Comparable to STK's integrated web marketing offering with similar SME client focus.
• Geniee: Japanese ad tech company providing supply-side platform and digital advertising technology. Comparable to STK in digital advertising operations but technology-platform focused rather than agency-focused.
• Macromill: Japanese digital marketing services and market research company. Comparable to STK in the marketing services and data-driven campaign support space.
• Sportograf: International sports event photography company providing online photo sales for marathons and races. Directly comparable to STK Photo Service in business model and customer base.
• ValueCommerce: Japanese affiliate and performance marketing company. Comparable to STK in digital advertising operations, particularly in performance-driven ad buying, but operates at greater scale.
• FreakOut Holdings: Japanese programmatic advertising and digital marketing company specializing in DSP and data-driven ad buying. Comparable to STK's media buying and digital advertising operations, with stronger technology focus.
• MarathonFoto: Global sports event photography company specializing in marathon and endurance event photo sales. Directly comparable to STK Photo Service in serving amateur race participants with online photo purchasing.
• Allied Architects: Japanese digital advertising company focused on performance marketing and ad operations. Comparable to STK's web marketing and media buying services with similar mid-market positioning.

Broad incumbents

• Septeni Holdings: Large Japanese digital advertising holding company offering media buying, creative, and ad tech services. Directly comparable to STK in the digital advertising operations function but at vastly greater scale and broader service portfolio.
• Digital Garage: Japanese internet advertising, marketing, and fintech group operating a digital advertising business alongside payment and crypto services. Comparable to STK in digital advertising and integrated online marketing but much broader scope.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat4 records

Key risks5 records

Key highlights7 records

Customer concentration

Compliance2 records

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 STK