About Us :: OSO is

OSO is

Be special, Be different Founded in 1999, OSO became the first SEO (Search Engine Optimization) company in Korea. With accumulated, advanced SEO technology and know-how, OSO has provided high-quality SEO, search marketing, and SMO (Social Media Optimization) to numerous Korean and international companies including several Fortune 500 companies.

OSO, as your local agency or partner, will serve you high-quality, reliable social media marketing services as well as SEO and search-based services.

  • Company – OSO Co
  • Founder/CEO – Ricky Kwon
  • Founded in – July 1999
  • Business Area – SEO, Social Media Optimization (SMO), Search Marketing, Video SEO
  • Location – 39 Daehak-ro 11-gil, Jongno, SEOUL, KOREA
  • Telephone – T. +82-2-744-0541~0543 / F. +82-2-744-0601
  • Websites – www.123sem.com (eng)

Business Scope

OSO’s Continuous Optimization Platform
  • China Marketing
  • Japan Marketing
  • Global Marketing
  • SEO
  • Video SEO
  • Keyword ADs(PPC/CPC)
  • YESSEO™ Landing Pages Solution
  • Korea Online Viral Marketing
  • Social Media Optimization
  • Blog Marketing / Power Bloggers
  • Community(Cafe) Marketing
  • Knowledge Search
  • Campaign analysis / management
  • Online Marketing Strategies Planning
  • SEO/SEM Consulting/Education
  • Content & Online Advertising Planning


  • Creativeness
  • Passion
  • Considerateness


We're not around right now. But you can send us an email and we'll get back to you, asap.


©2015 123Sem.com Korea Marketing Service Site from OSO

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