2025/6/19 04:49
List of Top Japanese SEO Agencies in 2025
Looking for a Japan-focused SEO partner that aligns search performance with business results?
Japan’s search landscape rewards agencies that can fuse meticulous keyword research with culturally attuned content and precision advertising.
In this guide, we spotlight eight standout firms—from tool-driven innovators like CINC and Faber Company to full-funnel strategists such as CoDigital and Nyle—that have proven they can move the revenue needle for domestic and international brands alike.
Read on for a concise, side-by-side view of their strengths, specialties, and why each might be the catalyst for your next stage of growth in Japan.
- Featured SEO Agencies
- CoDigital, inc.
- CoDigital, inc. Company Overview
- CINC Corp.
- CINC Corp. Company Overview
- Nyle Inc.
- Nyle Inc. Company Overview
- Faber Company Inc.
- Faber Company Inc. Company Overview
- Humble Bunny
- Humble Bunny KK,Company Overview
- GMO TECH, Inc.
- GMO TECH, Inc. Company Overview
- Speee Inc.
- Speee Inc. Company Overview
- GEOCODE CO.,LTD.
- GEOCODE CO.,LTD. Company Overview
- Full Speed Inc.
- Full Speed Inc. Company Overview
- Looking for an SEO agency that truly understands the Japanese market?
Featured SEO Agencies
Company Name | Primary Business / Features |
Provides digital marketing support, including SEO consulting, content creation, and digital advertising. Strength lies in crafting efficient strategies that integrate advertising and SEO. | |
Centers its business on providing "Keywordmap," an in-house developed SEO and content marketing tool, along with consulting and content creation support. Strong focus on data analytics. | |
Provides comprehensive digital marketing support, including SEO consulting, content creation, and website improvement. Has an extensive track record, especially in media management and content marketing. | |
Primarily develops and provides "MIERUCA," an SEO and content marketing support tool. Specializes in visualizing user insights to support corporate web marketing. | |
Provides performance marketing services in Japan, specializing in SEO, PPC advertising, and conversion optimization. Strength lies in its unique LocaRISE® framework that drives measurable growth. | |
Offers a wide range of web acquisition services, including SEO, MEO (Map Engine Optimization), and affiliate advertising. A member of the GMO Internet Group. | |
Utilizes SEO expertise gained from operating comparison websites in lifestyle sectors like real estate and home renovation to support corporate digital transformation (DX). | |
Has been providing SEO services since its founding, offering one-stop solutions from website production and SEO to web advertising management. Possesses a wealth of experience. | |
Provides SEO consulting, content marketing, and social media marketing. Has experience supporting a wide range of industries. |
CoDigital, inc.
CoDigital Inc. is a Japan-based digital marketing agency with a strong focus on both SEO and paid advertising.
In addition to a full range of SEO tactics, the agency offers integrated solutions that blend organic search with advertising and other marketing initiatives to drive efficient, measurable results. CoDigital provides services in Japanese, English, and Chinese, earning the trust of numerous global companies.
CoDigital, inc. Company Overview
Item | Detail |
CEO | Takeshi Sawaki |
HQ | Kuwano Building 2F, 6-23-4, Jingu-mae, Shibuya, Tokyo, Japan |
Founded | April 2022 |
Company No. | |
Website |
CINC Corp.
Image: CINC Corp. Website
CINC’s core strength is Keywordmap, a marketing‑research and analysis suite that employs natural‑language processing to deliver high‑precision insights rapidly.
The company differentiates itself by coupling the tool with seasoned consultants and analysts who craft and execute bespoke, data‑driven strategies—an integrated "SaaS + consulting" approach.
CINC is extending the "SEO as gateway" strategy through the fusion of marketing data and financial services. Its deep insights into corporate digital health empower the new M&A arm to identify underrated acquisition targets or synergistic matches—an expansion far beyond conventional marketing services. Financial disclosures show significant upfront investment in this new pillar, underscoring expectations that it will drive future growth.
CINC Corp. Company Overview
Item | Detail |
CEO | Tomonori Ishimatsu |
HQ | 6 F, Tokyu Toranomon Bldg., 1-21-19 Toranomon, Minato-ku, Tokyo |
Founded | April 2014 |
Listing | TSE Growth / 4378 |
Employees | 118 (as of 31 Oct 2024) |
Group Cos. | CINC Capital (M&A brokerage) |
Website |
Nyle Inc.
Image: Nyle Inc. Website
Nyle runs on two clear pillars: (1) the Horizontal DX business, including its legacy SEO consulting and flagship app‑review media Appliv; and (2) the Automotive DX business, which dives deep into the car industry. The strategy blends a stable, horizontal service base with a high‑growth vertical play.
Active in digital marketing since 2010, Nyle delivers end‑to‑end SEO, content production, and CRO. Owned media such as SEO HACKS and Appliv showcase its expertise while generating leads.
Nyle Inc. Company Overview
Item | Detail |
CEO | Tsubasa Takahashi |
HQ | 7 F, JRE Higashi‑Gotanda 1‑chome Bldg., 1‑24‑2 Higashi‑Gotanda, Shinagawa‑ku, Tokyo |
Founded | 15 Jan 2007 |
Listing | TSE Growth / 5618 |
Employees | 262 (consol., YE Dec 2024) |
Group Cos. | Patio Inc. |
Website |
Faber Company Inc.
Image: Faber Company Inc. Website
True to its name—faber is Latin for "craftsman"—Faber Company seeks to "replicate craftsmanship with technology." Its business is product‑centric, anchored by the Mieru‑ca suite of marketing tools. SaaS is the revenue engine, complemented by expert consulting and a marketer‑talent matching service.
Flagship Mieru‑ca SEO commands top domestic share, with 1,800+ installations. Success stories span multiple sectors—for example, Infocom cut ad spend to one‑third while increasing leads 1.4×, and Mynavi Works lifted sessions 150 %.
With an English product, international offices, and conference presence, Faber stands out for tech‑centric partnerships. Overseas companies can license the SaaS directly and/or engage top experts for consulting.
Faber Company Inc. Company Overview
Item | Detail |
CEO | Masaki Inaji (President) / Nobuo Furusawa (Founder) |
HQ | 23 F, Kamiyacho Trust Tower, 4‑1‑1 Toranomon, Minato‑ku, Tokyo |
Founded | 24 Oct 2005 |
Listing | TSE Standard / 220A |
Employees | 65 (as of Sep 2024) |
Group Cos. | |
Website |
Humble Bunny
Image: Humble Bunny Website
Humble Bunny is a Tokyo‑based performance marketing agency specializing in SEO, paid advertising, and conversion optimization. Through its proprietary “LocaRISE® Conversion Stack,” the agency delivers impressive average outcomes—3× traffic growth, 5.7× e‑commerce sales lift, and 5.8× lead acquisition rates. Available in both English and Japanese, Humble Bunny supports global brands entering or scaling in the Japanese market.
Humble Bunny KK,Company Overview
Item | Detail |
CEO | Nathan Hoernig |
HQ | 3-6-2 Shibuya 4F, Shibuya-ku, Tokyo 150-0002 |
Founded | 1 Nov 2016 |
Employees | 10-15 |
Website |
GMO TECH, Inc.
Image: GMO TECH, Inc. Website
As part of GMO Internet Group, GMO TECH dedicates itself to internet customer‑acquisition services. The primary Customer Acquisition segment accounts for 95 % of revenue, covering SEO, MEO, web ads, and affiliate ads. The firm dominates MEO for brick‑and‑mortar chains and is aggressively shifting to recurring‑revenue models.
The dual offering of SEO + MEO is key. MEO Dashboard by GMO won "ITreview Best Software in Japan 2025" TOP100. AI reveals keyword sentiment in reviews, supports competitor benchmarking, and offers multilingual UI.
On the SEO side, GMO TECH deploys AI‑based search marketing and distributes the Lumar technical‑SEO platform. The strong technology stack and GMO brand enhance differentiation.
Ideal for overseas retailers and F&B chains pursuing multi‑location expansion in Japan.
GMO TECH, Inc. Company Overview
Item | Detail |
CEO | Akihito Suzuki |
HQ | Cerulean Tower, 26‑1 Sakuragaoka‑chō, Shibuya‑ku, Tokyo |
Founded | 4 Dec 2006 |
Listing | TSE Growth / 6026 |
Employees | 230 (consol., YE Dec 2024) |
Group Cos. | Under GMO Internet Group, includes GMO TECH Holdings, GMO Design One, GMO e‑Networks |
Website |
Speee Inc.
Image: Speee Inc. Website
Rooted in mobile SEO, Speee is among Japan’s top sellers of SEO solutions. Consulting powers customer acquisition for its own vertical platforms such as real‑estate site Ieul.
Speee’s deep understanding of underserved Japanese industries and proven business‑development capability offer value far beyond marketing. Engineering teams operate in English, signalling global readiness.
Speee Inc. Company Overview
Item | Detail |
CEO | Hideki Otsuka |
HQ | 35F & 39F, Roppongi Grand Tower, 3‑2‑1 Roppongi, Minato‑ku, Tokyo |
Founded | 29 Nov 2007 |
Listing | TSE Standard / 4499 |
Employees | ~600 |
Website |
GEOCODE CO.,LTD.
Image: GEOCODE CO.,LTD. Website
Geocode’s dual pillars are Web‑Marketing (86 % of sales) and Cloud Sales Tech (14 %). The company aims to cover both "offense" (lead acquisition) and "defense" (operational efficiency) for SMEs.
Its “Organic Marketing” philosophy merges SEO with site development, UI/UX, and content. Geocode is a four‑time Google Premier Partner.
Attractive for overseas firms targeting Japan’s SME sector and needing integrated marketing‑to‑sales support. However, explicit English‑language support is unclear.
GEOCODE CO.,LTD. Company Overview
Item | Detail |
CEO | Daisuke Haraguchi |
HQ | 10 F, JR Shinjuku Miraina Tower, 4‑1‑6 Shinjuku, Shinjuku‑ku, Tokyo |
Founded | 14 Feb 2005 |
Listing | TSE Standard / 7357 |
Employees | 129 (as of 1 Mar 2025) |
Website |
Full Speed Inc.
Image: Full Speed Inc. Website
Full Speed offers end‑to‑end digital marketing—SEO, PPC, social, site dev—plus proprietary ad‑tech (ADMATRIX DSP, afb). Acquisition by FreeBit provides technological backing.
Over 7,000 clients and 100,000+ articles produced underline execution power. Blog Growth Seed showcases breadth: SEO, UI/UX, MEO, corporate training.
Post‑privatization, strategic direction aligns with FreeBit’s focus on DX, video, AI, Web3, and specialized verticals (healthcare, inbound tourism).
Particularly strong in China market entry, with local subsidiary and deep ties to Baidu, Sina, Tencent.
Full Speed Inc. Company Overview
Item | Detail |
President | Koichi Tomomatsu |
HQ | 8 F, E‑Space Tower, 3‑6 Maruyama‑chō, Shibuya‑ku, Tokyo |
Founded | Jan 2001 |
Status | Delisted 1 Sep 2022 (Ticker 2159) |
Employees | 433 (consol., Apr 2024) |
Parent | |
Website |
Looking for an SEO agency that truly understands the Japanese market?
If you’re serious about winning organic traffic —and customers—in Japan, our team at CoDigital would love to help.
As the authors of this guide and a multilingual agency trusted by global brands, we blend deep-dive SEO with precision paid media to deliver measurable growth.
Ready to see what that looks like for your business?
Contact CoDigital for a free Japanese SEO consultation and let’s chart your path to higher rankings and revenue in the Japanese market.
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