辞書と出版のパイオニア
三省堂 (Sanseido) (sanseido.co.jp) scores 38 out of 100 on Brand Analyzer, placing it in the Early Stage tier among Media & Entertainment brands, Education brands, in the 0th percentile of 21057 Media & Entertainment brands.
三省堂 (Sanseido) is a Japanese publishing company founded in 1915 and headquartered in Kanda-Misakichō, Tokyo. It specializes in dictionaries and educational books, publishing well-known registered trademark titles such as 大辞林, 明解, 新明解, ウィズダム, エースクラウン, クラウン, コンサイス, ジェム, センチュリー, and ビーコン. The company focuses on providing accurate and reliable language and learning content for students, educators, language learners, and general readers, positioning itself as a traditional and trusted leader in Japanese dictionary and educational publishing.
| Brand Name | 三省堂 (Sanseido) |
|---|---|
| Domain | sanseido.co.jp |
| Industry | Media & Entertainment, Education |
| Founded | 1915 |
| Headquarters | Kanda-Misakichō |
| Main Competitors | Taishukan Shoten (66/100), Obunsha (65/100), Shogakukan (74/100), Iwanami Shoten (45/100), Benesse Corporation (72/100) |
Moz Domain Authority 38/100 vs category average 53 / leader 100 - limited third-party links, so AI systems rarely encounter mentions of the brand.
三省堂 (Sanseido) has a dedicated Wikipedia entity - a top-weighted signal AI models rely on to identify and describe the brand.
The homepage meta description reads "※「大辞林」「明解」「新明解」「ウィズダム」「エースクラウン」「クラウン」「コンサイス」「ジェム」「センチュリー」「ビーコン」は三省堂の登録商標です" (Meta description too short (1 words). OG description present but brief) - this is the summary AI engines are most likely to quote.
Structured data on the homepage: og:title, og:description. Adding Organization and FAQ schema would further help AI crawlers parse the brand's identity.
AI-crawler access: No robots.txt found (default: all bots allowed, but explicit file preferred) - robots.txt controls whether engines like GPTBot and ClaudeBot can read the site at all.
Social footprint: verified profiles on X (Twitter), Facebook, Instagram; no detected presence on LinkedIn, YouTube, GitHub - consistent profiles reinforce the brand's identity across the web.
0 Reddit mentions - community discussion signals real-world reputation to AI models.
Live results from asking a general-purpose AI assistant about the brand, checked October 2026.
When asked "What is 三省堂 (Sanseido)?", Claude could identify the brand as of October 2026. Sanseido is a long-established Japanese publishing company founded in 1881, best known for producing dictionaries and reference books, including Japanese language, kanji, and bilingual dictionaries used widely in schools. Best known for Publishing authoritative Japanese dictionaries like Daijirin and various kanji and English-Japanese dictionaries.
When asked "Best brands similar to 三省堂 (Sanseido)?", Claude would recommend 三省堂 (Sanseido) as of October 2026. It's one of Japan's most respected dictionary and reference publishers, so it would naturally come up when discussing Japanese language reference or educational publishing.
Common questions people ask in Google, ChatGPT, Claude, Gemini, Perplexity, and other AI search engines.
三省堂 (Sanseido)'s main competitors in Media & Entertainment: Taishukan Shoten (66/100), Obunsha (65/100), Shogakukan (74/100), Iwanami Shoten (45/100), Benesse Corporation (72/100).
Sources: Brand Analyzer scan
三省堂 offers dictionaries and educational books, including registered trademark titles such as 大辞林, 明解, 新明解, ウィズダム, エースクラウン, クラウン, コンサイス, ジェム, センチュリー, and ビーコン. These cover Japanese-language dictionaries as well as other educational and reference content.
Sources: 三省堂 (Sanseido) official site
三省堂 (Sanseido) is a Japanese publishing company founded in 1915, headquartered in Kanda-Misakichō, Tokyo. It specializes in publishing dictionaries and educational books, and is known for registered trademark dictionary titles such as 大辞林 and 新明解国語辞典.
Sources: 三省堂 (Sanseido) official site
三省堂 (Sanseido) has limited AI-search visibility, scoring 42/100 on Brand Analyzer's AI visibility composite (visibility 65, trust 12, recommendation 37). This estimates how likely AI engines like ChatGPT, Claude, Gemini and Perplexity are to know, trust, and recommend the brand.
Sources: 三省堂 (Sanseido) official site
三省堂 (Sanseido) was founded in 1915. 三省堂 (Sanseido) operates in the Media & Entertainment category. It is analyzed by Brand Analyzer across seven brand dimensions and AI-search visibility.
Sources: Wikidata
三省堂 (Sanseido) is headquartered in Kanda-Misakichō. 三省堂 (Sanseido) operates in the Media & Entertainment category.
Sources: Wikidata
三省堂 publishes dictionaries and educational reference books. It produces well-known Japanese-language and bilingual dictionaries, including 大辞林, 明解, 新明解, ウィズダム, エースクラウン, クラウン, コンサイス, ジェム, センチュリー, and ビーコン, all of which are registered trademarks of the company, supporting language learning and education.
Sources: 三省堂 (Sanseido) official site
三省堂 (Sanseido) scores 37/100 on Brand Analyzer's AI recommendation signal, indicating it is less likely to be surfaced when AI assistants like ChatGPT suggest Media & Entertainment options. Recommendation depends on crawlability, structured data, and category authority; a Wikipedia presence helps.
Sources: 三省堂 (Sanseido) official site
三省堂 is known for its long-established dictionary brands, including 大辞林 (a major Japanese-language dictionary) and 新明解国語辞典, along with other registered trademark titles like ウィズダム and クラウン. These publications have a long history of use in education and language learning in Japan.
Sources: 三省堂 (Sanseido) official site
三省堂 (Sanseido) can improve AI discoverability by strengthening structured data (Organization and FAQ schema), maintaining an accurate Wikipedia/Wikidata entity, earning authoritative citations, and keeping content crawlable for AI bots. Brand Analyzer measures these as visibility, trust, and recommendation signals.
Sources: 三省堂 (Sanseido) official site
三省堂's dictionaries and educational books are used by students, educators, language learners, and general readers who need reliable reference and learning materials in Japanese and other languages.
Sources: 三省堂 (Sanseido) official site
三省堂 (Sanseido) scores 42/100 for AI visibility - how well ChatGPT, Claude, Perplexity and Google AI Overviews can discover, identify and cite the brand.
三省堂 (Sanseido) has a limited AI-visibility profile at 42/100 - a proxy for how readily ChatGPT, Perplexity and Google's AI Overviews can recognise and cite it. Its strongest area is visibility (65/100) and its weakest is trust (12/100). It benefits from a recognised Wikipedia company entity, a Wikidata knowledge-graph entry and open access for AI crawlers (GPTBot, ClaudeBot, etc.). The main gaps holding it back: a low Moz Domain Authority of 38/100, thin schema.org structured data and no llms.txt to steer AI to its best pages. In a live check, Claude could already identify 三省堂 (Sanseido) from memory (October 2026) - a sign these signals are paying off.
The score combines seven dimensions - name quality, digital presence, visual identity, messaging clarity, trust foundation, AI discoverability, and brand authority - into a single objective benchmark.
Ranked closest to 三省堂 (Sanseido): GILAJITU (38/100), NTT InterCommunication Center [ICC] (38/100), Watch2Movies (38/100), EDN - Edge Delivery Network (37/100).
A step up - brands to learn from: Zeneverzum (56/100), Zak Hotel (56/100).
Category leader: Change.org (97/100).
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