RSK

Name

RSK

Legal name

RSK Sanyo Broadcasting Co., Ltd.

Website

https://rsk.co.jp

Company type

Private

Founded year

1953

Operating status

Operating

Headcount range

51–100 employees

Ownership category

akta.pro rank

Product category

Regional Broadcasting

NAICS

Television Broadcasting Stations (516120), Radio Broadcasting Stations (51611)

SIC

Television Broadcasting Stations (4833), Radio Broadcasting Stations (4832)

akta.pro primary industry

Network-Affiliated Local TV Stations (ABC/CBS/NBC/FOX/CW/Telemundo/Univision, etc.) (MPABACAE)

akta.pro secondary industries

Network-Affiliated Local Radio Stations (News/Talk/Sports Syndication Affiliates) (MPABACAF), Local News & Weather Stations (MPABACAJ), Local Sports Broadcast Stations (Regional Local Rights, High School/College) (MPABACAK)

Keywords

• Regional television broadcasting
• Radio broadcasting services
• Local news media
• Weather information services
• Housing exhibition services

Headquarters

HQ city

Okayama

HQ country

Japan

HQ region

Asia

Offices1 record

Markets served

GTM type

B2C

Offering type

Services

Cost components

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

Revenue model

1. Television Broadcasting: RSK broadcasts television content as part of the JNN (TBS) network, generating revenue through advertising sales, program sponsorships, and broadcast licensing agreements.
2. Radio Broadcasting: Radio broadcasting services on AM1494kHz and FM91.4MHz frequencies, generating revenue through radio advertising and sponsorship.

Go-to-market motion1 record

Distribution channels5 records

Marketing channels10 records

Core offering

RSK Sanyo Broadcasting operates regional television broadcasting on Channel 6 as part of the JNN (Japan News Network) affiliated with TBS, alongside AM radio (1494kHz) and FM radio (91.4MHz) broadcasting serving viewers and listeners in Okayama and Kagawa prefectures in Japan. The company produces and distributes local news, weather forecasts, sports coverage, disaster prevention information, and entertainment programming, complemented by a proprietary mobile application for audience engagement, a housing exhibition complex, weather information services, podcast distribution, and community events. Revenue is generated primarily through television and radio advertising sales, program sponsorships, and broadcast licensing agreements.

Product overview

RSK Sanyo Broadcasting (RSK山陽放送) operates a multi-platform broadcasting and media business in Okayama and Kagawa prefectures, Japan. The core offerings consist of television broadcasting (Channel 6, JNN/TBS network) and radio broadcasting (AM 1494kHz, FM 91.4MHz), complemented by the RSK App for viewer engagement and the RSK Hous housing exhibition complex. The RSK App serves as a digital hub providing program information, contest entry, stamp rally participation, news, weather forecasts, and horoscopes. The RSK Hous facility hosts 22 home-building companies with 29 model houses. Supporting services include weather information, podcast distribution, the RSK Rose Garden, and environmental/social initiatives like the garbage prevention campaign and stamp rally promotions. The company maintains a strong digital presence across LINE, Instagram, X (Twitter), Facebook, TikTok, and podcast platforms.

Differentiator

Problem solved

Functional benefit

Brands

• RSK Housingu Puraza (RSKハウジングプラザ): A major housing exhibition center in the Chugoku-Shikoku region featuring 22 companies and 29 model houses
• RSK Baraen (RSKバラ園)
• RSK App
• aresuke (アレすけ)

Products and services

• RSK App (RSKアプリ) Mobile application for iOS and Android that provides TV and radio program information, contest entry, stamp rally participation, news, weather forecasts, horoscopes, push notifications, and video content for RSK viewers and listeners in Okayama and Kagawa.
• RSK Housing Plaza (RSKハウジングプラザ) A large-scale housing exhibition complex operated by RSK Sanyo Broadcasting in Kurashiki, Okayama, featuring 22 homebuilder exhibitor companies and 29 model houses, providing home-building consultation services to consumers. Accompanied by RSK Rose Garden, dog run, and event facilities.
• RSK TV Broadcasting (RSK山陽放送 テレビ) Television broadcasting service on Channel 6 as part of the JNN (TBS) network, providing local news, weather, sports coverage, and original programming including evening news, weather forecasting shows, and regional content for Okayama and Kagawa prefectures.
• RSK Radio Broadcasting (RSK山陽放送 ラジオ) Radio broadcasting service on AM 1494kHz and FM 91.4MHz frequencies, providing news, talk shows, music programs, sports coverage, and disaster information to listeners in Okayama and Kagawa prefectures. Podcast versions of select programs are distributed via Anchor, Apple Podcast, Spotify, and Amazon Music.
• Okayama 12 Towns Stamp Rally (おかやま12町村スタンプラリー) A digital stamp rally campaign operated via the RSK App, encouraging users to visit 12 towns in Okayama Prefecture to collect stamps at designated checkpoints and win prizes. Promotes tourism and local specialties across 12 rural townships in Okayama prefecture.
• RSK Weather Information (RSK気象情報) Comprehensive weather information service including local forecasts for Okayama and Kagawa, typhoon tracking, rainfall data, temperature predictions, UV index, wind information, radar imagery, and weather satellite data for residents of Okayama and Kagawa prefectures.
• RSK Rose Garden (RSKバラ園) A rose garden facility adjacent to the RSK Housing Plaza exhibition, featuring approximately 400 varieties and 1 million rose plants. Open seasonally with admission fees; part of the RSK Land complex in Kurashiki, Okayama.
• Podcast RSK Podcast distribution service for RSK radio programs, available through Anchor, Apple Podcast, Spotify, and Amazon Music platforms, enabling on-demand access to broadcast content.
• RSK Evening News (RSKイブニングニュース) Flagship TV news program airing weekdays at 6:15 PM (5:15 PM on Saturdays), covering local Okayama and Kagawa news, weather, sports, and national/international stories. Also distributed via Instagram.
• Emi-chan Weather Forecast (笑味ちゃん天気予報) Weekday TV weather program featuring the mascot character Emi-chan (sponsored by JA Group Okayama), presenting local weather alongside agricultural and local product information. Airs at 6:50 PM on weekdays.
• Aresuke (アレスけ) RSK Sanyo Broadcasting's official character mascot, available as a LINE Friends contact with LINE stamp series for messaging. Promotes TV and radio programs and engages with viewers through social media and merchandise.

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration5 records

Partnerships

Six partnerships are on record, tiered core, major and minor.

• TBS (Tokyo Broadcasting System) / JNNcoreStrategic or Co-development PartnerRSK is a member of the JNN (JAPAN NEWS NETWORK), the national news network operated by TBS (Tokyo Broadcasting System). This partnership enables RSK to broadcast national news programs and access syndicated content while providing local Okayama/Kagawa content to the network.
• NewsDig TBScoreTechnology or IntegrationRSK participates in NewsDig, a news aggregation platform operated by TBS, allowing RSK news content to be distributed through this digital platform alongside content from other JNN affiliates.
• RSK Hous ing Plaza Exhibitors (22 companies)coreChannel Partner/ Reseller/ DistributorRSK operates RSK Hous ing Plaza, a comprehensive housing exhibition center in Kurashiki, Okayama with 22 exhibitor companies featuring 29 model houses. The exhibitors include major homebuilders such as Sekisui House, Daiwa House, Panasonic Homes, Toyota Homes, Mitsui Home, Sumitomo Forestry, and local contractors.
• Okayama Township Association (岡山県町村会)majorStrategic or Co-development PartnerRSK partners with the Okayama Township Association to co-organize the Okayama 12 Towns Stamp Rally 2026, promoting tourism and local特产 across 12 rural townships in Okayama prefecture.
• Okayama City PTA Council (岡山市PTA協議会)minorStrategic or Co-development PartnerRSK co-hosts annual garbage prevention and environmental awareness cinema events with the Okayama City PTA Council, promoting environmental education to families.
• Okayama Road Office (岡山国道事務所)minorOthersRSK collaborates with the Okayama Road Office on the garbage prevention campaign, using official statistics about road waste disposal costs (approximately 65m³ or 1,500 bags annually, costing 10 million yen to collect) to raise awareness.

Scale indicators1 record

Recent moves6 records

Expansion highlights5 records

Direct peers

• KRY Yamaguchi Broadcasting: KRY is the JNN/TBS affiliate for Yamaguchi Prefecture, directly adjacent to RSK's Okayama/Kagawa market. It operates the same JNN network relationship, dual TV/radio broadcasting model, and regional event/community programming framework, making it a near-twin structural peer.
• MBS Mainichi Broadcasting System: MBS is a JNN/TBS network affiliate in the Kansai (Osaka) region operating TV and radio under the same network relationship as RSK, though at materially larger scale. It is directly comparable in business model and content sourcing, providing an upside benchmark for what scale a successful JNN affiliate can reach.
• RCC Chugoku Broadcasting: RCC is the JNN/TBS network affiliate serving the Hiroshima/Chugoku region, structurally identical to RSK as a regional broadcaster carrying TBS network programming while producing local news, weather, and events. It is the closest geographic peer and operates the same dual TV/radio model for an adjacent Japanese region.
• HBC Hokkaido Broadcasting: HBC is a JNN/TBS network affiliate and regional broadcaster in Hokkaido, operating the same broadcast-plus-subsidiary structure (housing exhibitions, events) that RSK employs. It serves a comparably sized regional market with analogous TV and radio operations.
• TBC Tohoku Broadcasting: TBC is the JNN/TBS affiliate in Miyagi/Tohoku region, operating TV and radio under the same JNN affiliation framework as RSK. It represents a structurally identical regional broadcaster model in a different Japanese geography.

Broad incumbents

• Nippon TV Holdings: Nippon TV operates the competing NNN national network and competes with JNN/TBS for advertising budgets and audience share. While not directly comparable in scale or operating geography, it shapes the competitive landscape RSK operates within as a regional affiliate of a rival network.
• Asahi Broadcasting Group Holdings: Asahi Broadcasting Group operates the ANN/TV Asahi national network, directly competing with JNN/TBS affiliates like RSK. Its Kansai-headquartered regional operations mirror RSK's regional broadcasting model under a different national affiliation.
• TBS Holdings: TBS Holdings is the parent national network of the JNN affiliation that RSK belongs to. It supplies RSK with syndicated content and is both a partner and an upstream industry incumbent whose strategic decisions on digital transformation directly affect RSK's competitive positioning.
• NHK (Japan Broadcasting Corporation): NHK is Japan's public broadcaster with nationwide TV and radio channels plus regional bureaus covering Okayama and Kagawa. While publicly funded rather than advertising-supported, it competes directly with RSK for local audience attention in news, weather, and disaster information.
• Fuji Media Holdings: Fuji Media Holdings operates the FNN national network (with Kansai TV and other regional affiliates) and is one of the five major Japanese commercial broadcast networks. It competes with JNN/TBS for advertisers and provides a structural benchmark for national/regional broadcast economics.

Market position

Weaknesses5 records

Competitive moat4 records

Key risks1 record

Key highlights5 records

Customer concentration

• Xx.com/RSK_EveningNews
• YouTubeyoutube.com/channel/UC
• Facebookfacebook.com/RSK%E5%B1%B1%E9%99%BD%E6%94%BE%E9%80%81-111970448890580
• Instagraminstagram.com/rsk_tv_and_radio
• TikToktiktok.com/@rsk_official

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Subsidiaries5 records

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 RSK