AdQuick aggregates Seoul's 14,000+ digital screens -- Gangnam, Myeongdong, Hongdae, COEX, ICN and GMP airports, and the Subway -- into a single buy. CPMs KRW 4,500 programmatic to KRW 28,000+ on Gangnam and COEX K-Pop Square spectaculars; activate from KRW 1.5M, K-pop comeback and Chuseok takeovers in seven figures.
Programmatic open-exchange inventory is accessible through DSPs from test budgets of roughly ₩2,500,000–₩10,000,000 (USD $1,800–$7,000). KOBACO measurement, KCSC creative compliance, and Seoul Metro / KORAIL / Incheon Airport approvals — covered in one place.
DOOH Advertising in Seoul: Inventory, Costs & Programmatic Guide
Digital out of home advertising in Seoul covers an estimated 80,000+ digital screens across the Seoul Metropolitan Subway, ICN and GMP airports, the COEX K-POP Square Wave anamorphic LEDs, Gangnam and Myeongdong corridors, Yeouido, DDP, Lotte World Tower-adjacent screens, and 15,000+ apartment and office elevator LCD networks. Typical CPMs range from ₩6,000–₩15,000 for subway D6s and elevator LCDs to ₩35,000–₩90,000+ for premium COEX and Gangnam landmark LEDs.
Seoul DOOH is defined by venue environment. Plans typically blend across these four layers to balance impact, frequency, and CPM efficiency.
COEX K-POP Square Wave (d'strict), Gangnam Station and Sinnonhyeon LEDs, Myeongdong spectaculars, Yeouido 63 Building, DDP and Lotte World Tower-adjacent screens. SOV packages anchor flagship K-Wave campaigns.
Seoul Metropolitan Subway (23 lines, 700+ stations), in-train LCDs, station dominations, KTX/SRT high-speed rail at Seoul Station, Yongsan, and Suseo, plus ICN and GMP airport digital. The mass-commuter and traveller backbone.
JCDecaux Korea bus shelters, Kakao T and Tada taxi digital, Seoul-area pedestrian LEDs across Hongdae, Itaewon, Cheongdam-dong, Gwanghwamun. Hyperlocal pedestrian and rideshare reach with strong daypart flexibility.
15,000+ apartment-complex and Grade-A office elevator LCDs (Nasmedia and Mezzomedia), premium mall digital, CJ CGV / Lotte Cinema / Megabox screens, plus cafés, gyms, karaoke, and convenience stores. Captive dwell and frequency.
DOOH pricing in Seoul depends on venue type, format, daypart, campaign duration, and buying model. Four pricing models are in active use.
Cost per thousand impressions — increasingly dominant for programmatic DOOH (pDOOH) and cross-border programmatic buys. Range: ₩6,000–₩90,000+ depending on venue.
SOV / weekly package — dominant for premium COEX, Gangnam, and Myeongdong landmark LED spectaculars, where slot share is the standard buying unit.
Per-play pricing used on apartment and office elevator LCD networks and some place-based screens; you pay per play insertion or per loop rotation.
PG — fixed impression count at a negotiated CPM, delivered via DSP against a reserved deal ID. Bridges direct buy certainty with programmatic delivery.
| Format | Typical CPM (₩) | Typical Minimum Buy | Buying Model |
|---|---|---|---|
| Apartment elevator LCD (Nasmedia, Mezzomedia) | ₩6,000–₩15,000 | ₩3,500,000/week | Loop share / programmatic |
| Grade-A office elevator LCD | ₩10,000–₩22,000 | ₩5,000,000/week | Loop share / programmatic |
| Seoul subway platform D6 / digital poster | ₩8,000–₩18,000 | ₩4,000,000/week | SOV / programmatic |
| Seoul subway station digital dominations | ₩15,000–₩40,000 blended | ₩15,000,000/week | Direct / PG |
| Seoul subway in-train LCD | ₩7,000–₩16,000 | ₩4,000,000/week | SOV / programmatic |
| ICN Incheon Airport digital (airside + landside) | ₩30,000–₩80,000 | ₩20,000,000/week | Direct / PG |
| GMP Gimpo Airport digital | ₩20,000–₩55,000 | ₩10,000,000/week | Direct / PG |
| KTX/SRT stations (Seoul Station, Yongsan, Suseo) | ₩15,000–₩35,000 | ₩8,000,000/week | Direct / PG |
| Premium mall digital (Starfield COEX, Hyundai, Lotte, The Hyundai Seoul) | ₩18,000–₩50,000 | ₩7,000,000/week | SOV / programmatic |
| COEX K-POP Square / Wave LED (d'strict) | Quoted by slot share | ₩30,000,000–₩120,000,000/week | SOV packages |
| Gangnam Station / Sinsa / Sinnonhyeon LEDs | Quoted by slot share | ₩25,000,000–₩80,000,000/week | SOV packages |
| Myeongdong landmark LEDs | Quoted by slot share | ₩20,000,000–₩70,000,000/week | SOV packages |
| Yeouido IFC / 63 Building | Quoted by slot share | ₩15,000,000–₩60,000,000/week | SOV packages |
| Bus shelter digital (Seoul city) | ₩10,000–₩25,000 | ₩5,000,000/week | SOV / programmatic |
| Taxi digital (Kakao T, 타다 Tada) | ₩7,000–₩18,000 | ₩3,500,000/week | Programmatic / direct |
| Programmatic open exchange (blended cross-border) | ₩7,000–₩30,000 | ~₩2,500,000 test | Auction |
Ranges reflect typical Seoul in-charge rates for commercial campaigns; agency-negotiated rates and programmatic auction clearing prices can run below these floors. Cross-border DSP pricing typically settles in USD with automatic KRW conversion. For live quotes tied to actual availability, pull pricing through the AdQuick marketplace.
DOOH inventory in Seoul is defined by venue environment, not creative format. Below, the venue categories that matter and who owns them.
| Venue Category | Primary Media Owners | Typical CPM (₩) | Best For |
|---|---|---|---|
| Apartment elevator LCD | Nasmedia (나스미디어) affiliated, Mezzomedia (메조미디어), Focus Media Korea (where applicable), local operators | ₩6,000–₩15,000 | Mass urban, family demo, captive dwell |
| Grade-A office elevator LCD | Nasmedia, Cheil OOH, Mezzomedia | ₩10,000–₩22,000 | B2B, finance, tech decision-makers |
| Seoul subway (platform, in-train, tunnel) | Seoul Metro Advertising (서울교통공사 광고), JCDecaux Korea (selected lines) | ₩7,000–₩40,000 | Mass commuter, 7M+ daily riders |
| ICN Incheon International Airport digital | Incheon Airport Media, JCDecaux Korea | ₩30,000–₩80,000 | International travellers, luxury, Asian-hub transit |
| GMP Gimpo Airport digital | Gimpo Airport Media, JCDecaux | ₩20,000–₩55,000 | Domestic business, short-haul Tokyo/Osaka/Beijing |
| KTX / SRT stations | KORAIL Advertising, SR Advertising | ₩15,000–₩35,000 | Intercity business, Busan/Daejeon/Daegu corridor |
| Premium shopping (Starfield COEX, Lotte Department Store, Hyundai, The Hyundai Seoul, IFC Mall) | Nasmedia, JCDecaux Korea, mall-specific concessionaires | ₩18,000–₩50,000 | Luxury, K-beauty, fashion, CPG |
| Landmark / full-motion LED (COEX K-POP Square, Gangnam, Myeongdong, Yeouido, DDP) | d'strict (COEX Wave), Gangnam-area concessionaires, Myeongdong ops | SOV packages | K-Wave, tourism, global brand amplification |
| Bus shelter digital | JCDecaux Korea, Seoul-area operators | ₩10,000–₩25,000 | Pedestrian, hyperlocal |
| Taxi digital (Kakao T, Tada) | Kakao Mobility, Tada, T-Map Mobility | ₩7,000–₩18,000 | 25–45 urban mobile reach, nightlife |
| Place-based (cafés, gyms, karaoke, convenience stores) | Mezzomedia, Cheil OOH, local networks | ₩10,000–₩22,000 | Lifestyle, K-beauty, food & beverage |
| Cinema digital | CJ CGV Media, Lotte Cinema, Megabox | ₩18,000–₩40,000 | Entertainment, younger audiences |
The globally viral 3D anamorphic curved LED at COEX in Samseong-dong, designed and operated by d'strict — the template that made Seoul synonymous with 3D DOOH and a tourist destination in its own right.
Dense LED spectaculars anchoring Seoul's premium shopping and business district along the Gangnam–Sinnonhyeon corridor.
K-beauty and tourism capital of Seoul; concentrated LED spectaculars on the Myeongdong shopping streets reach inbound Chinese, Japanese, and Southeast Asian visitors.
Seoul's financial-district LEDs overlooking the Han River — finance, broadcast, and National Assembly audience.
Zaha Hadid-designed fashion and design hub with modern LED-first installations, anchoring Seoul Fashion Week and 24-hour shopping audiences.
The world's busiest subway loop line; concentration of D6, station dominations, and in-train digital across Gangnam, Hongik, Jamsil, and Seoul Station interchanges.
The global Asian hub, with T2 as the newer DOOH-dense terminal — international travellers, luxury, and Asian-hub transit audiences.
123-storey landmark with adjacent LED spectaculars serving the Jamsil/Sincheon/Gangnam-southeast corridor — families, tourism, and luxury shoppers.
Covers an estimated 15,000+ Seoul apartment and office buildings — Korea's largest captive-dwell elevator LCD category, with concentrations in Gangnam, Seocho, Songpa, Mapo, Yongsan, Nowon, and Bundang/Pangyo.
| Metric | 2026 Snapshot |
|---|---|
| Estimated digital OOH screens in Seoul Metropolitan Area | 80,000+ |
| Dominant media owners | Nasmedia (나스미디어), JCDecaux Korea, Mezzomedia (메조미디어), Cheil Worldwide OOH, Innocean OOH, Seoul Metro Advertising, Incheon Airport Media, d'strict (COEX Wave) |
| Lowest self-serve programmatic entry | ₩2,500,000–₩10,000,000 (USD $1,800–$7,000) via AdQuick, Vistar, VIOOH, Nasmedia |
| Typical CPM range | ₩6,000 (subway/elevator) to ₩90,000+ (premium landmark) |
| Korean audience currency | KOBACO (한국방송광고진흥공사), KADD (Korea ADvertising Data), mobile panel verification |
| Regulator | KCSC (방송통신심의위원회 / Korea Communications Standards Commission), Korea Fair Trade Commission (KFTC) under the Act on Fair Labelling and Advertising |
| Subway / airport creative approval | Seoul Metro Advertising (서울교통공사 광고), KORAIL Advertising, Incheon International Airport Corporation (IIAC), Gimpo Airport Media |
Two formats define Seoul DOOH at scale: the Seoul Metropolitan Subway network (23 lines, 700+ stations, ~7 million daily riders across Seoul Metro/KORAIL/9호선/Shinbundang) and the Nasmedia-led elevator LCD network — the Korean version of the captive-dwell elevator category. These are the planning workhorses for any serious Seoul campaign.
| Subway Format | Dimensions / Resolution | Typical Location | Slot |
|---|---|---|---|
| Platform digital 6-sheet (D6) | 1080×1920 portrait | Platform walls, concourses | 10–15 sec in 60-sec loop |
| Digital lightbox / pillar | Various | Station pillars, passageways | 10 sec |
| Tunnel LED / train-window sequence | Synchronised LED array | Facing platforms at major stations | 15–30 sec storytelling |
| In-train LCD | 1920×1080 | Carriage interiors, door tops | 10–15 sec loop |
| Station Digital Domination | Multiple synchronised screens | Flagship stations (Gangnam, Hongik University, Jamsil, Seoul Station, Gangnam-gu Office, COEX/Samseong) | Customised |
Creative approval: Seoul subway creative is reviewed by Seoul Metro Advertising (서울교통공사 광고) under Seoul Metropolitan Government advertising policies. Allow 7–10 business days for clearance. Political, gambling, alcohol (partial), pharmaceutical, adult products, and cryptocurrency all carry tight restrictions.
Nasmedia (나스미디어, KOSDAQ-listed 089600.KQ, a KT Group subsidiary) operates one of Korea's largest elevator LCD networks alongside Mezzomedia and Cheil OOH-affiliated networks. Two subformats:
Nasmedia is accessible programmatically through select cross-border DSP deal IDs and PMPs, in addition to traditional direct buys and its own SSP/DSP offering.
KOBACO and KADD audience measurement: Reach and frequency on Seoul subway, elevator, and landmark inventory are reported through KOBACO (한국방송광고진흥공사 / Korea Broadcast Advertising Corporation) and KADD, combining passenger counts, mobile device panel verification, and Statistics Korea data.
Korea's programmatic DOOH market has expanded meaningfully with Nasmedia's SSP/DSP integration, VIOOH's Korean inventory expansion, and the growth of cross-border DSP access. Seoul is the largest programmatic DOOH market in Korea.
A DSP sends bids into an SSP representing one or more media owners. When a play opportunity opens on a screen, the SSP runs an auction (or fulfils a reserved deal) and returns the winning creative to the ad server. Screen-level identifiers, venue taxonomy, and dayparting determine which auctions your campaign participates in. Cross-border campaigns typically settle in USD via a DSP's Korea-compliant billing path; domestic KRW buys transact through Korean agencies or direct DSP/SSP accounts.
DSP and marketplace — transacts programmatically across every major SSP (Vistar, Hivestack, Place Exchange, Broadsign Reach, VIOOH, Nasmedia) and aggregates direct inventory from every major Seoul media owner (Nasmedia, JCDecaux Korea, Mezzomedia, Seoul Metro Advertising, Incheon Airport Media, d'strict, Cheil OOH) in a single unified plan, with native KOBACO/KADD planning, creative delivery, and attribution.
KT Group-owned; operates both a media network and its own SSP/DSP; primary domestic buying path for Korean advertisers.
Largest pDOOH DSP globally; APAC coverage including Seoul via SSP partnerships.
JCDecaux-backed SSP with DSP functionality; primary path into JCDecaux Korea's subway, airport, and bus shelter inventory.
Integrated with Broadsign Reach SSP and Broadsign's CMS footprint across APAC.
DOOH as a channel within TTD's omnichannel buying; growing Korea access.
Omnichannel DSP with DOOH inventory access for Korean cross-border campaigns.
Kakao Group affiliate; integrated media and SSP offering for Korean inventory.
Omnichannel DSP with DOOH module; Korea supply via SSP integrations.
Accessible via AdQuick, direct Nasmedia DSP/SSP, and select programmatic paths for apartment/office elevator, mall, and supplemental inventory.
JCDecaux's SSP. Accessible via AdQuick, VIOOH (primary), Vistar for Seoul subway (selected lines), ICN/GMP airports, and bus shelters. The JCDecaux "Visit Korea" DOOH-plus-YouTube engagement case is the proof point.
Strong APAC footprint; accessible Seoul inventory via deal IDs across Korean media owner partners.
Integrated into The Trade Desk, Yahoo DSP, and other omnichannel DSPs for DOOH line items reaching Seoul inventory.
Broadsign's SSP with APAC DOOH supply, including Korean media-owner partners on the Broadsign CMS footprint.
Kakao Group affiliate SSP path; strong in place-based and elevator. Accessible via AdQuick and direct.
| Deal Type | How It Works | Typical Use |
|---|---|---|
| Open exchange | Auction-based buying against any qualifying inventory at the floor CPM. | Lowest CPM; growing share of Korean DOOH. |
| Private marketplace (PMP) | Invite-only deal with preferred floor and premium inventory. | The most common programmatic path for Korean brand campaigns. |
| Programmatic Guaranteed (PG) | Fixed impression count, fixed CPM, reserved inventory. | Bridges direct buy certainty with programmatic delivery. |
Korean DOOH measurement consolidates around KOBACO and the newer KADD standards, with mobile panel verification playing a central role given Korea's ~100% smartphone penetration.
Impressions, reach, frequency, Share of Voice (SOV), CPM, CPV, store visits, Naver/Kakao branded search lift, Coupang/Naver Shopping traffic lift, Kakao mini-app engagement, and conversion lift where first-party data is available.
Most Seoul DOOH uses standard digital specs, with longer 15-second creative durations and bilingual considerations distinct to the Korean market.
| Format | Resolution | Aspect | Duration | File |
|---|---|---|---|---|
| Subway platform D6 / portrait mall / elevator LCD | 1080×1920 | 9:16 | 10–15 sec | MP4, JPG, PNG |
| Subway in-train + lightbox landscape | 1920×1080 | 16:9 | 10–15 sec | MP4, JPG, PNG |
| Airport / large-format mall | 1920×1080 or custom | 16:9 | 10–20 sec | MP4, JPG, PNG |
| COEX Wave / 3D anamorphic LEDs | Custom (3D workflow) | Curved / bespoke | Typically 15 sec | MP4 + 3D-aware brief |
| Gangnam / Myeongdong / Yeouido landmark LEDs | Custom (building-specific) | Varies | Varies | Owner-specified |
All Korean advertising, including DOOH, is subject to the KCSC (방송통신심의위원회 / Korea Communications Standards Commission) and the Korea Fair Trade Commission (KFTC) under the Act on Fair Labelling and Advertising (표시·광고의 공정화에 관한 법률). Categories with extra scrutiny in Seoul:
Korea's DOOH ecosystem is concentrated among a handful of dominant operators across elevator, transit, airport, landmark, and place-based environments.
Apartment + Grade-A office elevator LCD; dominant Korean DOOH network as a KT Group subsidiary. Korea's largest captive-dwell elevator category.
Elevator, place-based, and digital DOOH as a Kakao Group affiliate; strong in lifestyle and apartment supplemental supply.
Seoul subway (selected lines), ICN Incheon Airport, and bus shelters across the city. Primary VIOOH-enabled programmatic supplier in Korea.
Seoul Metropolitan Subway digital master operator for most city-run lines, including platform D6, in-train, lightbox, and station digital domination inventory.
KTX and national rail digital inventory across Seoul Station, Yongsan, and Suseo, plus the wider intercity Busan/Daejeon/Daegu corridor.
ICN Incheon Airport digital estate covering airside and landside, T1 and T2 — international travellers, luxury, and Asian-hub transit reach.
GMP Gimpo Airport digital, focused on domestic business and short-haul Tokyo / Osaka / Beijing routes.
COEX K-POP Square "Wave" anamorphic LED design, build, and concession. The studio behind the global 3D DOOH template.
Samsung-affiliated and Hyundai-affiliated OOH operations, with major Seoul inventory across place-based, premium mall, and Grade-A office environments.
Kakao T taxi digital screens — 25–45 urban mobile reach with rideshare and nightlife strength across central Seoul districts.
Cinema digital networks across Seoul and the wider metropolitan area, with younger audiences and entertainment context for film, beauty, and CPG brands.
Gangnam GS Tower, Myeongdong shopping district, Yeouido 63 Building, DDP, and Lotte World Tower-area screens — bespoke processes, SOV-package buying.
AdQuick, Nasmedia, Vistar Media, VIOOH, Broadsign Ads, Mezzomedia, Moving Walls, The Trade Desk (OpenPath DOOH), Yahoo DSP, StackAdapt DOOH.
AdQuick is a DSP and marketplace that transacts programmatically across every major SSP (Vistar, Hivestack, Place Exchange, Broadsign Reach, VIOOH, Nasmedia) and aggregates direct media-owner inventory from Nasmedia, JCDecaux Korea, Mezzomedia, Seoul Metro Advertising, KORAIL Advertising, Incheon Airport Media, d'strict (COEX Wave), Cheil OOH, and Kakao Mobility into a single unified plan — with native mapping, creative delivery, KOBACO/KADD audience planning, mobile audience extension, and foot-traffic attribution. That means one platform to plan, buy, measure, and report across the full Seoul DOOH landscape — rather than running parallel DSP seats and parallel owner RFPs, navigating Korean-language paperwork, and managing cross-border billing in multiple currencies.
Seoul's DOOH map is district-driven. Each gu and corridor anchors a distinct audience, format mix, and signature inventory.
Audience: Finance, business, luxury shoppers, K-beauty, 25–45 professionals, tourists.
Audience: Business travellers, international visitors, global brand audiences.
Audience: Luxury shoppers, celebrity-spotting, K-fashion, 25–40 affluent.
Audience: Inbound tourism (Chinese, Japanese, SE Asian), K-beauty shoppers.
Audience: Gen Z, students, K-pop fans, nightlife, indie culture.
Audience: Expats, diplomats, hospitality, luxury residential.
Audience: Finance, National Assembly, KBS/MBC broadcast HQ, 30–55 professionals.
Audience: Families, tourism, luxury shoppers, Gangnam-southeast residential.
Audience: Fashion wholesale, tourism, 24-hour shopping, design.
Audience: Government, tourism, traditional culture.
Audience: KTX travellers, commuters, hotel district.
Audience: Tech (Kakao, Naver, SK Telecom), IT workers, 25–40.
Audience: International travellers, luxury, transit hub.
Korean DOOH advertisers navigate a layered compliance stack covering broadcast standards, fair-labelling rules, transit and airport approvals, sector-specific restrictions, PIPA, and Seoul municipal sign ordinances.
The KCSC reviews broadcast and online advertising; KFTC enforces the Act on Fair Labelling and Advertising; superlative and misleading claims carry corrective orders and fines.
Korea's data protection law (개인정보보호법). DOOH screens themselves do not collect personal data; mobile audience extension tactics using device IDs fall under PIPA — ensure your DSP and data vendor operate with explicit consent signals. Korea's PIPA is among the strictest globally.
Three reference tiers from a cross-border programmatic test through a flagship K-Wave activation, with line-item breakdowns.
Single DSP, Gangnam/Seocho geofence, 2-week flight, KOBACO-benchmarked reporting and bilingual creative. Approx. USD $1,800–$7,000.
Multi-venue programmatic with weather and fine-dust DCO, audience extension, and a foot-traffic lift study. Approx. USD $28,000–$105,000.
Direct SOV across the COEX Wave, Gangnam, Myeongdong, Yeouido, ICN, and Line 2 with rolling programmatic PMP and brand lift. Approx. USD $350,000+/quarter.
Three viable buying paths, depending on budget, scale, cross-border complexity, and comfort with Korean media operations.
Contact Nasmedia, JCDecaux Korea, Mezzomedia, Seoul Metro Advertising, KORAIL Advertising, Incheon Airport Media, d'strict (for COEX Wave), Cheil Worldwide OOH, Innocean OOH, or a Korean agency directly. Best for flagship, landmark, and large-budget direct buys (COEX Wave 3D takeovers, Gangnam Station dominations, ICN airport premium walls, Nasmedia Tier-1 elevator packages). Downsides: parallel RFPs in Korean, KRW invoicing and typically a Korean billing entity, Korean-language creative approval paperwork, and slow plan stitching across owners — particularly challenging for international brands without a Korean entity or local agency of record.
Activate through any of the DSPs buying Seoul inventory: AdQuick, Vistar Media, The Trade Desk, StackAdapt, VIOOH, Broadsign Ads, Mezzomedia, Nasmedia, Yahoo DSP, or Moving Walls. Best for impression-based, flexible, and data-targeted campaigns from roughly ₩2,500,000 (USD $1,800) test budgets upward. Cross-border advertisers can typically settle in USD with automatic KRW conversion. Downsides if picking a single non-unified DSP: some DSPs have limited Nasmedia, Mezzomedia, or Seoul Metro access, so you won't see every Seoul SSP's supply from one seat.
AdQuick is a DSP and marketplace — it transacts programmatically across every major SSP (Vistar, Hivestack, Place Exchange, Broadsign Reach, VIOOH, Nasmedia) and aggregates direct inventory from every major Seoul media owner (Nasmedia, JCDecaux Korea, Mezzomedia, Seoul Metro Advertising, KORAIL Advertising, Incheon Airport Media, d'strict, Cheil OOH, Kakao Mobility) in a single unified plan, with KOBACO/KADD audience data, creative delivery, bilingual creative approval workflows, mobile audience extension, and foot-traffic attribution all native — plus USD settlement for cross-border advertisers. The fastest path for any international buyer entering Korea without a domestic entity, or any domestic buyer who wants full-market access without running parallel DSP seats and owner RFPs.
Quick answers on screens, costs, programmatic, measurement, minimum budgets, buying paths, creative specs, and K-Wave strategy.
AdQuick is the DOOH DSP and marketplace that unifies programmatic buying across every major SSP (Vistar, Hivestack, Place Exchange, Broadsign Reach, VIOOH, Nasmedia) with direct media-owner inventory across Seoul — including Nasmedia's apartment and office elevator network, JCDecaux Korea's subway, ICN, and bus shelters, Mezzomedia's place-based and digital inventory, Seoul Metro Advertising's subway digital estate, KORAIL Advertising's KTX stations, Incheon Airport Media's ICN estate, d'strict's COEX K-POP Square Wave 3D anamorphic LED, Cheil Worldwide OOH, Innocean OOH, Kakao Mobility's Kakao T taxi network, and local Gangnam, Myeongdong, Yeouido, and Jamsil landmark LED concessionaires.
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