Top 10 Japanese SEO Agencies and Experts in Tokyo

Top 6 Japanese SEO Agencies


I want to contact an SEO agency in Japan. Which agencies should I reach to?
I want to know the top SEO companies in Japan.



Who is the most famous SEO expert in Japan?

If you have this question, I’m here to help you.

  • Large-scale Japanese Digital Marketing Agency
  • Small-scale Japanese Digital Marketing Agency
  • Bilingual Digital Marketing Agency
  • Individuals / Freelancer

Today, I’m going to introduce you the SEO Agencies with good reputations in Japan.


Let’s get started!

Large-scale Japanese Digital Marketing Agency


CyberAgent was founded in 1998 and is considered the most famous digital agency in Japan.

The company function with more than 5,000 employees and provide a variety of services including SEO and marketing services, media operation, gaming services, etc.

The company earns revenue of around 400 billion yen(4 billion US dollars).


Unfortunately, their service fee is extremely pricy.


IREP (アイレップ)

IREP was found in 1997 and generates more than 80 billion yen(300 million US dollars) in revenues.

The company function with 1,000 employees and provides services in Digital Marketing, SEO, SEM etc.

The focus of the company is to target a big enterprise in industries.

Fyi, I contacted IREP for SEM services in the past, but they introduced their subsidiary company(Localio) because the budget was too small.

  • Company Name: IREP (アイレップ)
  • Address: 〒150-6021 Tokyo, Shibuya City, Ebisu, 4 Chome−20−3 Garden Place Tower 21F (See in Google Map)
  • Website:


Opt (オプト)

Opt was founded in 1994 and became a part of Digital Holding Group in 2015.

The company provides services in SEO, PPC, Social Media, Media Services, and other digital solutions.

The price range would be reasonable compared to CyberAgent and IREP.

Small-scale Japanese Digital Marketing Agency



Jade was found in 2019 by Kazushi Nagayama(Former Google Employee)  and Masahiro Tsuji(SEO Influencer) and quickly become a significant player in the SEO and digital marketing industry.

The company believes in guiding the clients about the right internet market strategies that will help their businesses grow in the long term.

  • Company Name: Jade(ジェイド)
  • Address: 〒107-0061 Tōkyō-to, Minato City, Kitaaoyama, 1-chōme−4−4 Kitaaoyama Bldg 9F (See in Google Map)
  • Website:

Web Rider

Web Rider is a content-focused marketing agency based in Tokyo and Kyoto.

The top priority of the company is to use effective ways for SEO and content marketing strategy and help businesses generate more leads and increase the number of customers in the long term.

The company was founded in 2010 and function with around 10 employees.

  • Company Name: Web Rider(ウェブライダー)
  • Address: 〒150-0013 Tōkyō-to, Shibuya City, Ebisu  1-chōme-13-1   Ebisu Suzuki Bldg 3F (See in Google Map)
  • Website:


  • Full Speed
  • Septini
  • GMO
  • Nyle
  • DYM
  • DM Solutions
  • Faber Company

Bilingual Digital Marketing Agency

Info Cubic

Info Cubic is a bilingual digital agency based in Tokyo.

The company is specialized in search marketing and developing new ways to stay ahead and provide clients a complete experience.

The company was founded in 2007 and provides global SEO and marketing strategies for a large scale of Japnese companies to bring new customers and market entrants for the sites.

iProspect Japan

iProspect Japan

iProspect is the world’s leading digital marketing agency from Boston, USA.

The company was found in 2003 and function with 100 employees.

  • Name: iProspect Japan
  • Address: Nomura Ginza Building 12F 6-18-2 Ginza, Chuo-ku, Tokyo, 104-0061, Japan (See in Google Map)
  • Website:

Zo Digital Japan

Zo Digital Japan

Zo Digital Japan is a full-service SEO agency based in Tokyo, founded in 2016.

The top priority of the company is to use effective ways for SEO analysis and help businesses generate more leads and increase the number of customers.

Fyi, I had a chance to work with him in the past and I felt that his personality and project management skills were excellent as well as SEO and digital marketing skills.

Humble Bunny

humble bunny

Humble Bunny was found in 2009 and function with around 38 employees.

The major services of the company include Graphic, Digital, Branding Design, and Development, Marketing, and Advertising.

Fyi, I had a chance to talk with CEO Nathan Hoernig before, he was really humble and interesting to talk with.

Individuals / Freelancer

Suzuki Kenichi

Suzuki Kenichi is famous for his SEO blog ““.

Currently, the main focus of his activity is to provide SEO training through the YouTube channel and his blog.

Taiyo Sumi

He is one of the Japanese SEO experts that I respect the most.

The focus of his activity is to target smaller businesses with his subscription service.


Thanks for reading!



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