Best AI SEO agencies in Tokyo, 2026

BEST FOR — Listed Japanese enterprises and large DTC brands that need an integrated internet advertising, AI creative, and AEO programme delivered by Japan's single largest digital ad operator.

CyberAgent holds the largest internet advertising share in Japan, runs a 100-researcher AI Lab founded in 2016, and has industrialised generative-AI creative production at a scale no Tokyo pure-play SEO shop can match. For a Rakuten-tier or Sony-tier marketing director who needs LLMO, AEO, video, and paid layered into one accountable Shibuya retainer, CyberAgent is the obvious incumbent. Recent 3D AI video ad work covered by Nikkei Asia signals the direction of travel.

WATCH-OUT — Enterprise-only economics, large account teams with rationed senior strategist time, and a heavy weighting toward paid media means standalone AEO retainers can feel bolted onto a media plan rather than led by it.

BEST FOR — Mid-market Japanese brands and inbound foreign teams that want a senior Tokyo SEO consultancy with its own AEO-capable tooling rather than a packaged agency programme.

PLAN-B started its SEO practice in 2007, reports 4,000-plus client engagements, a 95.3% SEO consulting retention rate, and runs more than 200 dedicated SEO staff alongside an in-house writer bench of 100-plus. The proprietary SEARCH WRITE tool covers content SEO planning, analysis, implementation, and project management, and the firm has been one of the louder Japanese voices on GEO and LLMO in 2026. The English-speaking consulting team also makes inbound onboarding genuinely workable.

WATCH-OUT — Broad services pitch covering SEO, ads, and web development means AEO is a layer on top of an SEO core; senior strategist time is gated above the mid-tier retainer and the GEO offering is newer than the platform itself.

BEST FOR — Mid-market Japanese SaaS, ecommerce, and content-heavy brands that want the Mieruca SEO platform paired with senior consulting on AI-era visibility.

Faber Company has been self-developing the Mieruca SEO platform since 2013 and reports more than 1,900 corporate customers, including Kao, Fujifilm, and Bizreach. The firm convenes the Japan SEO Conference, which drew over 3,000 registrants in 2025 and is the largest SEO and GEO event in the country, and has reorganised its 2026 offering around an explicit SEO, GEO, and LLMO trio. For a Japanese marketing team that wants the tooling, the community, and a working point of view on AI search in one Tokyo retainer, Faber is the natural fit.

WATCH-OUT — The Mieruca platform and consulting bundle is built for Japanese-language work first; outbound English programmes for SEA and US markets are not the strongest part of the offer.

BEST FOR — Brands that want competitive intelligence and AI search visibility tracking driven by a publicly listed SaaS plus consulting hybrid, with explicit Google AI Overviews analysis built in.

Founded in 2014 and listed in 2021, CINC pairs the Keywordmap NLP analysis suite with seasoned consultants under a documented SaaS-plus-consulting model. The platform added Google AI Overviews analysis and AI-assisted content creation in its most recent overhaul, and the firm positions explicitly around SEO, AI search optimisation, and content marketing. The published catchcopy of 10 hours of competitive analysis in 2 minutes is marketing, but the underlying competitor research depth holds up.

WATCH-OUT — Tooling-led pricing means the floor sits above pure-services boutiques, and the consulting bench is smaller than PLAN-B or Faber; bespoke B2B positioning work is not the headline strength.

BEST FOR — B2B Japanese brands and inbound enterprise teams that need a content-marketing-first agency with a documented track record of running owned media properties at scale.

Innova has been positioned as the agency that introduced content marketing to Japan since its 2011 founding, with CEO Sunao Munakata bringing 25-plus years of global business experience. The roster reported in 2014 already included Yahoo Japan, Rakuten, Sony, DeNA, Opt, and Septeni Holdings, and the firm has taken Salesforce, Draper Nexus, and Nippon Venture Capital funding to scale the offer. For a B2B SaaS or enterprise marketing team that wants the AEO programme led by content strategy rather than tooling, Innova is the clearest Tokyo choice.

WATCH-OUT — Content-led delivery means technical AEO infrastructure work, schema, entity resolution, and AI Overviews engineering, sits behind the editorial offer; pricing for senior strategist time can run above platform-led peers.

BEST FOR — Mid-market and enterprise Japanese brands that want one of the deepest SEO benches in the country attached to a broader DX and marketing intelligence retainer.

Founded in 2007, Speee runs one of the largest SEO consulting support systems in Japan, reports more than 3,500 supported companies across EC, B2B, and healthcare, and was recognised as a Best Company by Great Place to Work in 2023 and 2024. The SEO consulting practice is framed explicitly around business performance metrics, LTV and profitability rather than rankings, and the engineering teams operate in English, which signals real readiness to serve Tokyo SaaS exporting to the US and SEA.

WATCH-OUT — Speee's centre of gravity has moved toward DX consulting and marketing intelligence over the past five years; pure-play AEO retainers compete internally with larger DX engagements for senior bench time.

BEST FOR — Japanese brands selling outbound to global markets and foreign brands selling into Japan, where multi-country and multi-language SEO and AEO is the constraint.

AUN Consulting was founded in 1998, is publicly listed, and reports a track record of supporting 2,000-plus organisations across overseas SEO, overseas paid search, overseas social, and country-specific localisation. The Marunouchi office and English-speaking consulting team make it one of the rare Tokyo agencies set up natively to handle a Japanese SaaS programme targeting the US, SEA, and Europe alongside the home market. AEO and AIO services are layered onto a deep multi-country search foundation.

WATCH-OUT — Multi-country generalist positioning; the deepest GEO and LLMO tooling sits with platform builders like Faber and CINC, and AUN's AI search work is newer than its core international search practice.