Prismgate

What Prismgate does

Prismgate (プリズムゲート株式会社) is a Japanese web consulting and corporate website production firm founded in July 2000 by Hiromi Shibata (芝田弘美), headquartered in Yokohama, Kanagawa with a Tokyo branch office in Nihonbashi, Chuo-ku. The company designs and builds WordPress-based CMS websites for Japanese SMBs in three primary verticals: manufacturing, construction, and professional services (士業: lawyers, tax accountants, administrative scriveners). Its core technology stack is WordPress CMS with a recently added Large Language Model Optimization (LLMO) layer intended to make client websites discoverable in AI-driven search and chat results.

The company's business model is a hybrid of one-time project fees (website production/renewal, character and print design), recurring subscription/maintenance revenue (Homepage Support Plan, WordPress Support), and professional services (LLMO consulting, SNS consulting, training and seminars). Distribution is sales-led with free in-person consultations at both offices and nationwide remote reach; marketing is content-driven through 5 published trade books, a YouTube channel (ホームページ大全), a stand.fm daily radio show, a weekly email newsletter, Instagram and X accounts, and seminars including an AI Agent seminar series. The firm owns a registered mascot character (Prism-kun, registered 2009) and emphasizes in-house full-order production without outsourcing, positioning its differentiator as marketing-perspective design optimized for inquiries and recruitment rather than pure visual output.

The firm is privately held, founder-operated, and bootstrapped with no disclosed external equity, debt, or M&A activity. Revenue is not publicly disclosed; headcount is described qualitatively as a small core team. The company is actively operating and entering 2026 with a newly relocated Yokohama headquarters tied to the Sakuragicho station-area redevelopment and an expanding AI-education service line anchored by its 5th book on LLMO/AIO.

Name

Prismgate

Legal name

プリズムゲート株式会社

Website

https://prismgate.jp

Company type

Private

Founded year

2000

Operating status

Operating

Short description

Prismgate is a Japanese SMB-focused web consulting firm that designs, builds, and supports WordPress-based corporate websites for manufacturing, construction, and professional-services (士業) clients, with a recent extension into LLMO/AIO search optimization consulting and seminars.

Ownership category

akta.pro rank

Product category

Web Design and Development Services

NAICS

Custom Computer Programming Services (541511), Graphic Design Services (541430), Web Search Portals and All Other Information Services (519290)

SIC

Services-Advertising Agencies (7311), Services-Computer Programming, Data Processing, Etc. (7370), Services-Management Consulting Services (8742)

akta.pro primary industry

Blogging & CMS Content Platforms (BPAMAJAG)

akta.pro secondary industries

Vertical/Specialty Search (e.g., jobs, real estate, travel, products) (BPAMAAAD), Prompt Engineering, Orchestration & LLMOps Tooling (HDAAACAD)

Keywords

• Corporate website production
• Web consulting services
• LLMO optimization services
• WordPress web development
• AI search optimization

Headquarters

HQ city

Yokohama

HQ country

Japan

HQ region

Asia

Offices2 records

Markets served

GTM type

B2B

Offering type

Services

Cost components

Personnel, Operations, Marketing or Sales, Technology or R&D, Infrastructure

Revenue model

1. Website Production/Renewal: Custom website design and development for corporate sites, serving manufacturing, construction, and professional services industries
2. Website Operation Support: Ongoing website maintenance, updates, and management services
3. LLMO Consulting: AI search optimization consulting services
4. Print Design Services: Character design, logo design, business card design, pamphlet design, POP advertising, greeting card design
5. Training and Seminars: Web/SNS training, seminars, lectures on website marketing and AI utilization

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels6 records

Core offering

Prismgate designs, builds, and operates custom corporate websites using WordPress CMS for Japanese SMBs in manufacturing, construction, and professional services (士業) industries. The company differentiates through marketing-focused design aimed at driving customer inquiries and recruitment, plus integrated LLMO (Large Language Model Optimization) consulting to make client sites discoverable in AI-powered search engines. Offerings extend into ongoing website operation support, SNS consulting, print design, and training/seminars.

Product overview

Prismgate offers a comprehensive suite of web services centered on its core LLMO Homepage Production platform, complemented by consulting, design, and training services. The product portfolio includes website creation and renewal optimized for AI search engines, social media consulting (YouTube, Instagram, X), WordPress support services, and character design/illustration services. The company provides end-to-end solutions from website creation through ongoing operation and AI search optimization, supplemented by training programs, seminars (including AI Agent seminars), recruitment video production, and published expertise through books on LLMO and web writing.

Differentiator

Problem solved

Functional benefit

Products and services

• LLMO Homepage Production/Renewal Custom corporate website design, development, and renewal services optimized for LLMO (Large Language Model Optimization), ensuring visibility in AI-powered search engines. Targeted at Japanese SMBs in manufacturing, construction, and professional services (士業) industries.
• LLMO Consulting Consulting services focused on optimizing client web presence for AI search engines and AI recommendations (AI荐). Helps clients structure content and metadata so that AI chatbots and AI-powered search engines can discover and recommend the client's website.
• Homepage Operation Support Ongoing website maintenance and operational support services, including a dedicated support plan subscription for regular updates, troubleshooting, and backups. Operates on a recurring subscription model.
• WordPress Support Service WordPress-based website operation and maintenance service, including updates, backups, and troubleshooting for clients whose sites were built by Prismgate or third parties.
• SNS Consulting Social media consulting covering YouTube, Instagram, and X (Twitter) channels for client social media strategy, content operation, and audience growth.
• Print Design Services Design services including character design, business card design, logo design, pamphlet design, POP advertising, and greeting card design. Delivered in PDF, PNG, and Illustrator AI formats.
• Web and SNS Training / Seminars Training programs, seminars, and lectures on website marketing, LLMO strategies, AI agents, and SNS utilization. Includes the "AI Agent Introductory Practice Seminar" series for business owners.
• Recruitment Video Production Video production services for recruitment purposes, designed to support SMB customer acquisition and talent recruitment goals through company introduction and recruitment-focused video content.

Quantifiable outcome

• 1000+ website projects completed over 26 years

Named customers3 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

AI capability8 records

Feature2 records

Partnerships

Four partnerships are on record, tiered minor and core.

• 和光大学 (Wako University)minorStrategic or Co-development Partner · 24 November 2022University partnership where representative conducts smartphone video editing seminars for students as part of 'Regional Design' curriculum. Seminars held 3 times at the university.
• 税理士法人 古田土会計 (Furuta Tax Corporation)minorGTM or Marketing PartnerYouTube collaboration where representative appears as guest on '中小企業の財務チャンネル' (SMEs Finance Channel) multiple times to discuss website marketing and business growth.
• 自由国民社 (Jiyu Kokuminsha)coreStrategic or Co-development PartnerPublisher of 4 of the representative's books: '儲かる会社はホームページが9割！', 'ホームページ集客大全100', 'Webライティング大全100', 'LLMO・AIO実践テクニック100'. Long-term publishing partnership.
• 中央経済社 (Chuo Keizaisha)minorStrategic or Co-development PartnerPublisher of the first book '新規顧客をバッチリつかむ 士業のためのホームページのつくりかた' published in 2013.

Scale indicators3 records

Recent moves9 records

Expansion highlights6 records

Direct peers

• LIG (株式会社LIG): Tokyo-based digital creative agency offering website production, web consulting, content marketing, and inbound strategy for SMBs and enterprises. Directly comparable as a Japanese web/digital agency with similar service mix and inbound marketing emphasis.
• Korekara (株式会社これから): Japan-focused website production and web marketing agency serving SMBs with SEO and inbound services. Closely comparable in customer segment (Japanese SMBs), service offering (website production + SEO/inbound), and GTM motion.
• Keyword Marketing (キーワードマーケティング株式会社): Japan-based SEO and web marketing consultancy focused on SMBs and mid-market. Directly comparable on SEO/AI-search optimization expertise and Japan SMB client focus.
• SAMURAI (株式会社SAMURAI): Japanese website production and SEO consulting firm targeting SMBs with WordPress-based sites and inbound marketing services. Direct overlap on WordPress CMS build, SEO/AI-search optimization, and SMB customer profile.
• ferret (Basic Inc., 株式会社ベーシック): Japan-based B2B marketing platform and agency offering content marketing, SEO, and lead-generation websites for SMBs. Comparable as an SMB-focused digital marketing service provider with strong content/inbound positioning.

Broad incumbents

• Wix.com: Global DIY website builder platform serving SMBs including in Japan. Comparable as a website creation alternative for the same SMB customer base, though self-serve versus Prismgate's service-led model.
• Jimdo (Jimdo GmbH): DIY website builder with a strong presence in Japan serving SMBs and individuals. Comparable as a website creation alternative in Prismgate's SMB segment, representing competitive pressure on traditional agency models.
• ValueCommerce (バリューマシーンインターナショナル / ValueCommerce): Long-established Japanese digital marketing and affiliate platform with broader capabilities including web production, SEO, and advertising services. Comparable as an incumbent Japanese digital marketing services player, though more diversified than Prismgate.
• HubSpot: Global CRM/inbound marketing platform with CMS and SEO tools increasingly used by SMBs. Comparable as an enabling platform for SMB website and inbound marketing — a substitute or complement to Prismgate's services.

Regional players

• Alta (株式会社アルタ): Japan-based digital agency offering website production, SEO, and web consulting services. Comparable service mix and SMB client base, but operates as a larger regional incumbent versus Prismgate's specialized vertical focus.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat3 records

Key risks6 records

Key highlights7 records

Customer concentration

• Xx.com/prismgate48
• YouTubeyoutube.com/channel/UCVvZcFp2umWAGaUBJ1T-Tnw
• Facebookfacebook.com/hiromi.shibata.965
• Instagraminstagram.com/prismgate_web

Revenue estimate

Valuation estimate

Number of profiles

Profiles1 record

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Prismgate