About Ⅱ BASE - SEO & Digital Marketing Agency in Japan

II BASE Inc. is a Tokyo-based bilingual SEO and digital marketing agency helping international businesses grow in Japan. Through Japanese SEO services, PPC, PR, and strategic planning, our local Japanese experts help global brands adapt their marketing to Japan’s unique search behavior, culture, and customer expectations.

We work with a limited number of clients at a time to ensure focused strategy, responsive communication, and hands-on execution. With II BASE, your brand gains a local partner committed to building visibility, trust, and sustainable growth in the Japanese market.

PROFILE

Year of establishment	April 2019
CEO	Ryota Kaku
Address	6th Floor, Nishishinjuku Mizuma Building, 3-3-13 Nishishinjuku, Shinjuku-ku, Tokyo, Japan
Capital	JPY 5 million
Japanese local staff	8
Business	– Digital Marketing Services (SEO, PPC, PR) – Japan Market Entry Support – Business Consulting – Developping IT Services – Runnning Web Media – Study Abroad Agency – Online English Coaching
Digital Marketing Services	SEO ・On-page SEO Services & Japanese Localization ・Off-page SEO Services & Link Building ・SEO Content Marketing Services ・SEO Consulting Services ・Local SEO Service ・LLMO & AIO Services PPC ・Paid Search Advertising ・Social Media Advertising Services ・Google Analytics Support PR ・Social Media Marketing Services ・Influencer Marketing Services ・Press Release Distribution Service
Telecommunications Service Provider Registration	Ministry of Internal Affairs and Communications Registration Number: A-04-19754
Invoice Registration Number	Qualified Invoice Issuer Registration Number: T9011001127384

ACHIEVEMENTS

Industry	Achivements
Web3 / Blockchain	Led a full-stack growth revamp for a blockchain service suffered from near-zero active usage despite a healthy pool of free sign-ups. Delivered (1) user-centric product redesign, (2) strategic partnerships with a leading Web3 communitiy, and (3) on-site activations at major Web3 events. Within a few months, this combination converted free users into paying adopters and generated service volume worth around $4 million with double-digit ROI multiples.
Real Estate	Reframed a “raise social engagement” request into an integrated, long- and short-term growth engine: SEO, PR via press releases & brand mentions, influencer marketing, and parallel PPC. In ~6 months, achieved a 10× lift in organic sessions and traffic value and filled paid/owned funnels to hit seminar acquisition and deal targets. The PR × SEO mix and SEO × PPC pairing are recognized best-practice combinations for authority building and scalable ROI.
Tourism	Delivered an average ROAS of 500% within six months by managing effective PPC campaigns on Google Ads, Meta Ads, Yahoo Ads.
Recruitment	Achieved a tenfold increase in organic monthly traffic and site traffic value in one year by creating SEO-based B2B content, optimizing page speed and user experience, and acquiring backlinks from authoritative Japanese websites through targeted outreach.
EdTech	Boosted organic traffic by 200,000 monthly visits (200% increase) and site traffic value by over $40,000 in one year through strategic SEO and content updates.
IT (In-house Business)	Thanks to our PR strategy and outreach, our website buying and selling service was featured in 10 media outlets as a recommended M&A platform, earning over 50 mentions. With a 94% closing rate, we finalized over 30 transactions in about one month. A year after launch, we sold the service following a compelling offer.
Media (In-house Business)	By optimizing site speed, link-building, and content, we doubled monthly traffic to nearly one million page views and 700,000 unique users. Meanwhile, our new YouTube channel—highlighting foreign tourists enjoying Japanese cuisine with influencer marketing—quickly surpassed 500,000 views and 3,000 subscribers in just few months. Combined with a strong presence on Instagram, X, and TikTok, our total social following reached 50,000. We also partnered with dozens of establishments, including “teamLab Planets Tokyo DMM“, further strengthening our track record.

MESSAGE

Helping Global Brands Grow in Japan Through Local Strategy

Entering the Japanese market is not just about translation. It requires a deep understanding of local search behavior, cultural expectations, customer trust, and the way people make decisions in Japan.

At II BASE, we help global businesses adapt their marketing strategy for the Japanese market through Japanese SEO services, PPC advertising, and PR support. Our role is to bridge the gap between your brand’s global strengths and what Japanese customers actually respond to.

What makes our approach different is focus. We work with a limited number of clients at a time so that every project receives thoughtful strategy, fast communication, and hands-on execution. From 2022 to 2025, we achieved more than 80% client retention rate, reaching 100% in 2024. For us, this level of client retention is a strong indicator of customer satisfaction and reflects the long-term partnerships we strive to build with every client.

We believe that successful marketing in Japan should be both strategic and deeply local. By combining data-driven execution with cultural understanding, we help brands build visibility, trust, and sustainable growth in Japan.

If you are looking for a local partner who understands both global business and the Japanese market, we would be happy to support your next step.

Ryota Kaku
CEO, II BASE Inc.

Career

2014

Studied abroad in the Philippines during his final year of high school, igniting his entrepreneurial spirit.
Founded a study-abroad agency while still at university, applying self-taught web marketing tactics to build an owned media channel from scratch—reaching 40,000 monthly page views and consistently generating about 100 study-abroad consultation requests per month.
Operated this business for approximately four years and eventually sold it due to an offer from the major company in the industry.
After graduation, spent around six months contributing to a new business project at a Japan-based IT startup overseas.

2019

Founded II BASE Inc., an IT service and web media company.
Operated a website M&A platform, reviewing around 200 websites, and sold the business within one year—marking his second successful business exit due to offers from other companies.
Subsequently managed web media that peaked at over one million monthly page views and focused on social media management, reaching approximately 50,000 followers within a year.
Launched more than ten websites across various ventures.
Successfully sold a web media business that achieved over one million monthly page views, marking his third business exit.

2022

Began full-scale marketing support, leveraging past experience in SEO, consulting, and web marketing for Japanese clients.
Collaborated with large-scale online English education providers (with over 1,000 employees globally) and multiple startups that raised multimillion-dollar funding—consistently driving remarkable client results.

2024

Contracted by a U.S.-based client, achieving about 500% ROAS in 6 months through PPC advertising and SEO.
Realized that by supporting international products and services, he could drive meaningful changes in the Japanese market.

2025

Officially launched a dedicated digital marketing support service for overseas companies entering the Japanese market, aiming to maximize their growth and success through proven marketing strategies.