暫定日本語訳:Review Schema

暫定日本語訳:どのように へ implement Review schema markup 向けに single editorial reviews, 何 schema.org/Review covers vs. 何 Google 使用 向けに review snippets, 適格性 rules, と どのように it relates へ AggregateRating.

初回公開:2026年6月27日 · 最終更新:2026年8月4日 · Advanced
言語

暫定日本語訳:Review schema (schema.org/Review) marks up single critic's または ユーザー's evaluation of one specific thing — one author, one itemReviewed, one reviewRating とともに ratingValue. それらの three fields are 必要 core. It's distinct から AggregateRating, which summarizes many reviews へ average; Google bundles both on one docs ページ because それら render 同じ stars, ただし rules diverge. If Review is nested inside reviewed item via review プロパティ, あなた omit itemReviewed と Google infers parent. single 大半の-missed rule: self-serving-reviews restriction (Google's September 2019 policy) is scoped へ LocalBusiness/Organization being reviewed on their own サイト — あなた できる't get stars 向けに testimonials について あなた own business — ただし reviews of Books, Movies, 商品, Recipes, と Software Apps are ない subject へ その carve-out. 有効 markup だけ earns rich-result 適格性 ( critic review snippet), 決して ランキング boost, と self-serving または fabricated reviews できる draw 手動 action.

暫定日本語案: TL;DR — schema.org/Review marks up single evaluation: one author, 暫定日本語案: one itemReviewed, one reviewRating.ratingValue. それらの three are 必要. If 暫定日本語案: Review is nested inside reviewed item via review プロパティ, omit 暫定日本語案: itemReviewed — Google infers parent — ただし still supply item’s name. 暫定日本語案: ratingValue defaults へ 1–5 scale unless あなた 設定 bestRating/worstRating, 暫定日本語案: と decimals 使用 dot, ない comma. one rule その outranks all others in 暫定日本語案: importance: self-serving-reviews restriction (Google’s September 2019 暫定日本語案: policy) 作る LocalBusiness/Organization ページ その carry reviews について 暫定日本語案: themselves ineligible 向けに star feature — including reviews pulled in 通じて 暫定日本語案: embedded third-party widget on あなた own サイト. その carve-out is scoped へ 暫定日本語案: business/organization items だけ; 商品, Book, Movie, Recipe, SoftwareApplication, 暫定日本語案: イベント, Course, Game と friends are ない restricted. 有効 markup earns 暫定日本語案: rich-result 適格性, 決して ランキング boost, と violations できる draw 手動 暫定日本語案: action. Whether あなた came here 向けに pure structured-データ angle または 暫定日本語案: ecommerce-review angle, both live in 同じ place — この topic is cross-listed 暫定日本語案: 下で structured データ と 下で ecommerce SEO 向けに その 理由.

Evidence for this claim Google excludes self-serving reviews for LocalBusiness and Organization from the star review feature. Scope: Google Search review snippet policy; this restriction is scoped and should not be generalized to every reviewed type. Confidence: high · Verified: Google: Review snippet structured data

Review vs. AggregateRating — get この straight 最初

暫定日本語案: Almost すべての mistake downstream starts とともに conflating これらの two types:

  • 暫定日本語案: Reviewone critic または ユーザー, one item, one rating. single write-up.
  • 暫定日本語案: AggregateRating — numeric summary of many reviews または ratings ( 暫定日本語案: average plus count).

暫定日本語案: Google’s docs bundle both on one ページ — “Review snippet (Review, AggregateRating) structured data” — because それら render 同じ star UI. ただし schema.org types 暫定日本語案: と their 適格性 rules diverge, と 必要 fields differ. Crucially, 暫定日本語案: それら’re meant へ be 使用 together: Google’s guidance is その “if you include multiple individual reviews, also include an aggregate rating of the individual reviews.” So decision isn’t Review または AggregateRating — it’s “one write-up → Review,” “an average across many → AggregateRating,” と “a page full of reviews → both.” その guidance runs one direction だけ: single Review doesn’t need 暫定日本語案: fabricated aggregate bolted on へ look more credible, と AggregateRating 暫定日本語案: doesn’t 必要とする あなた へ invent individual reviews へ back it — pair two だけ 暫定日本語案: いつ both genuinely exist. AggregateRating side of この gets its own treatment 暫定日本語案: in sibling 記事; here I’m strictly on single Review object.

Evidence for this claim When multiple individual reviews are included, Google directs publishers to also include an aggregate rating of those reviews. Scope: web Confidence: high · Verified: Review snippet structured data

必要 core: author, itemReviewed, reviewRating

暫定日本語案: Three プロパティ are 必要 向けに Review, per Google’s 必要-プロパティ 暫定日本語案: table on review-snippet doc (確認 2026-07-18; doc itself 表示 暫定日本語案: 最後-updated date of 2025-12-10, so この reflects 現在の version).

暫定日本語案: authorPerson または Organization. Google is explicit その “the reviewer’s name must be a valid name” と gives memorable counter-例: 暫定日本語案: “‘50% off until Saturday’ is not a valid name for a reviewer.” name 必要がある be 暫定日本語案: shorter than 100 characters, または ページ “won’t be eligible for an author-based review snippet.” Promotional strings dressed up as reviewer names are real, 暫定日本語案: 一般的な disqualifier.

Evidence for this claim Google requires a valid reviewer name and currently makes an author-based snippet ineligible when the name is 100 characters or longer. Scope: web Confidence: high · Verified: Review snippet structured data

暫定日本語案: itemReviewed — one of 有効 types, “the item that is being reviewed.” 暫定日本語案: この is どこ single-item scoping bites: Google wants あなた へ “provide review information about a specific item, not about a category or a list of items.” “Top 10 Best Blenders” roundup その wraps one Review around whole list is malformed 暫定日本語案: — 各 商品 needs its own review, または ページ needs 異なる treatment.

Evidence for this claim Google requires review information about a specific item, not a category or list of items. Scope: web Confidence: high · Verified: Review snippet structured data

暫定日本語案: reviewRating ( Rating) とともに reviewRating.ratingValue — score. 暫定日本語案: 向けに single Review この is normally plain Rating, ない AggregateRating 暫定日本語案: (その distinction trips 人々 up because Google’s shared doc mentions AggregateRating 暫定日本語案: as possible subtype). value できる be “a number, fraction, or percentage (for example, 4, 60%, or 6 / 10).” Two formatting rules 人々 miss:

  • 暫定日本語案: デフォルト scale is 1–5 (1 lowest, 5 highest). If あなた scale is 異なる, 暫定日本語案: 設定 bestRatingworstRating.
  • 暫定日本語案: Decimals 使用 dot, ない comma4.4, 決して 4,4, regardless of あなた 暫定日本語案: locale’s display convention.

暫定日本語案: Recommended (ない 必要): datePublished (ISO 8601), と 暫定日本語案: reviewRating.bestRating / worstRating. If bestRating is omitted, 5 is assumed; 暫定日本語案: if worstRating is omitted, 1 is assumed.

どこ Review schema is supported

暫定日本語案: Review is broader than 大半の 人々 assume. Google supports it 向けに Book, 暫定日本語案: Course, Event, LocalBusiness (とともに self-serving caveat below), Movie, 暫定日本語案: Product, Recipe, と SoftwareApplication — plus their subtypes と several 暫定日本語案: more: CreativeWorkSeason, CreativeWorkSeries, Episode, Game, MediaObject, 暫定日本語案: MusicPlaylist, MusicRecording, と Organization (again, とともに self-serving 暫定日本語案: caveat). HowTo is また 有効 itemReviewed type per Google’s 現在の 暫定日本語案: プロパティ reference — worth 確認 if あなた’re reviewing tutorials または instructional 暫定日本語案: コンテンツ, since it’s easy へ miss in prose list of “supported for” types. 暫定日本語案: Evidence for this claim Google limits review snippet eligibility to specific Schema.org types and applies additional content and policy rules. Scope: Google Search review snippet feature; Schema.org validity alone is insufficient. Confidence: high · Verified: Google: Review snippet structured data So critic reviewing film, ユーザー reviewing recipe, または editor 暫定日本語案: reviewing software app are all textbook, unrestricted 使用.

Nested vs. standalone — いつ へ omit itemReviewed

暫定日本語案: There are two shapes:

  • 暫定日本語案: Standalone Review — top-level Review その carries itemReviewed naming 暫定日本語案: 何 it’s について. この is “critic review” pattern (one journalist/publisher, 暫定日本語案: one thing, one rating).
  • 暫定日本語案: Nested ReviewReview placed inside reviewed entity via 暫定日本語案: review プロパティ (e.g., Game とともに "review": {…} block). Here Google says 暫定日本語案: へ omit itemReviewed: “if the review is nested into another schema.org type using the review property, omit the itemReviewed property (we assume the parent item is the reviewed item).” parent item’s name isn’t just good practice 暫定日本語案: here — Google’s own 必要-プロパティ table lists itemReviewed.name as its 暫定日本語案: own 必要 row, so nested Review とともに unnamed parent is 不足している 暫定日本語案: 必要 field, ない just 不足している context.

暫定日本語案: Getting この 誤った — supplying itemReviewed inside nested review, または omitting it 暫定日本語案: on standalone one — is one of 大半の 一般的な Rich Results テスト failures in この 暫定日本語案: space, と one その generic guides rarely walk 通じて.

self-serving-reviews rule — single 大半の 重要 restriction

暫定日本語案: この is rule へ internalize, because it’s どこ 古い “testimonials as review schema” tactic died と it’s thing competitor guides 大半の 多くの場合 bury.

暫定日本語案: Google, on review-snippet doc: “If the entity that’s being reviewed controls the reviews about itself, their pages that use LocalBusiness or any other type of Organization structured data are ineligible for star review feature.” と 暫定日本語案: 例 is unambiguous: “a review about entity A is placed on the website of entity A, either directly in their structured data or through an embedded third-party widget (for example, Google Business reviews or Facebook reviews widget).”

Evidence for this claim Self-controlled reviews of the entity itself are ineligible for Google's star review feature on LocalBusiness and Organization pages; this is not a universal prohibition on Product reviews. Scope: web Confidence: high · Verified: Review snippet structured data

暫定日本語案: Read carefully 何 この does — と doesn’t — cover:

  • 暫定日本語案: It’s scoped へ LocalBusiness / Organization items being reviewed. 暫定日本語案: business または organization rating itself on its own ページ gets no stars. その 暫定日本語案: 含む embedding third-party review widget (Google Business Profile, Facebook) 暫定日本語案: on あなた own サイト — ソース being external doesn’t rescue it if entity 暫定日本語案: controls ページ. Evidence for this claim Google excludes self-serving reviews for LocalBusiness and Organization from the star review feature. Scope: Google Search review snippet policy; this restriction is scoped and should not be generalized to every reviewed type. Confidence: high · Verified: Google: Review snippet structured data
  • 暫定日本語案: It does ない cover 商品, Book, Movie, Recipe, SoftwareApplication, イベント, 暫定日本語案: Course, Game, etc. Reviewing それらの on あなた own サイト is fine. Don’t overstate 暫定日本語案: policy’s scope — frequent mangling is “Google killed review stars,” いつ 暫定日本語案: ban is specifically について self-hosted business/organization reviews.

暫定日本語案: One thing worth being blunt について, since it’s ない spelled out verbatim in Google’s 暫定日本語案: docs と I don’t want へ overstate sourcing: relabeling reviewed entity as 暫定日本語案: Product または some other unrestricted type, いつ 何’s actually being reviewed is 暫定日本語案: あなた own business, isn’t documented workaround. restriction is written around 暫定日本語案: 何’s actually being reviewed と who controls ページ it’s reviewed on — ない 暫定日本語案: @type string あなた choose へ declare. Treat この as editorial judgment, ない 暫定日本語案: quoted policy: mislabeling entity へ dodge rule is kind of thing 暫定日本語案: 手動 reviewer is specifically looking 向けに.

暫定日本語案: Google また draws two adjacent lines: “Ratings must be sourced directly from users,”“Don’t rely on human editors to create, curate, or compile ratings information for local businesses.” と flat rule その applies broadly: あなた 暫定日本語案: できる’t scrape ratings から elsewhere“Don’t aggregate reviews or ratings from other websites.” Copying Yelp または Google stars onto あなた own ページ と marking them 暫定日本語案: up as yours is out.

暫定日本語案: policy dates へ roughly September 2019; Google announced it in 検索 Central 暫定日本語案: post on making review rich results more 役立つ. I’ll be honest について sourcing: 暫定日本語案: I couldn’t verify clean, pinned Mueller または Illyes quote specifically on 暫定日本語案: self-serving-review 手動-action mechanic, so I’m citing docs と policy 暫定日本語案: announcement rather than putting words in anyone’s mouth (see Quotes tab).

適格性, ない ランキング — と 手動-action risk

暫定日本語案: Two framing points その matter:

  • 暫定日本語案: Review markup earns rich-result 適格性, ない ランキング boost. best 暫定日本語案: ケース is critic review snippet — stars と summary text in listing. その できる 暫定日本語案: lift クリック-通じて, ただし it does ない move あなた up results. Any guide promising 暫定日本語案: “15–35% CTR lift” から review schema is quoting unverifiable stat; treat it 暫定日本語案: とともに suspicion.
  • 暫定日本語案: Violations できる trigger 手動 action. Google warns: “If your site violates one or more of these guidelines, then Google may take manual action against it. Once you have remedied the problem, you can submit your site for reconsideration.” 暫定日本語案: Google’s General Structured データ Guidelines spell out precise consequence: 暫定日本語案: “A structured data manual action means that a page loses eligibility for appearance as a rich result; it doesn’t affect how the page ranks in Google web search.” So penalty is scoped へ rich result, ない ページ’s ordinary 暫定日本語案: ランキング — あなた lose snippet until あなた fix violation と リクエスト 暫定日本語案: reconsideration, ただし あなた don’t get demoted または deindexed 向けに it.

暫定日本語案: It 役立つ へ 保つ six separate states straight, because “it validated” と “it shows stars” are ない 同じ fact: passing Rich Results テスト (field presence) 暫定日本語案: → Google supporting itemReviewed type at all → ページ being 適格 暫定日本語案: 下で guidelines (ない self-serving, ない scraped, visible コンテンツ) → Google 暫定日本語案: having actually インデックス登録 ページ → Google choosing へ display snippet → 暫定日本語案: と — entirely separate から all of above — ページ’s ランキング. ページ できる be 暫定日本語案: green 全体で 最初 five と still ない 順位 well, と ページ できる 順位 well 暫定日本語案: while 決して 表示 single star.

暫定日本語案: また remember visibility rule: reviews あなた mark up 必要がある be genuinely on 暫定日本語案: ページ と obvious へ ユーザー — “it must be immediately obvious to users that the page has review content.” Marked-up reviews その 訪問者 できる’t actually see are 暫定日本語案: guideline violation, ない just validation nit.

テスト と 監視

暫定日本語案: Validate markup とともに Rich Results テスト, then watch 検索 Console. 暫定日本語案: Google 追加 dedicated review-snippets レポート in 検索 Console (2020) その flags 暫定日本語案: which ページ are 適格 と which have errors — その’s diagnostic へ 確認 暫定日本語案: 後に あなた ship, since Rich Results テスト confirms field presence ただし ない policy 暫定日本語案: compliance (it won’t tell あなた あなた self-hosted business review is ineligible).

Bing と other engines

暫定日本語案: Bing’s structured-データ guidance is much thinner than Google’s. Bing supports 暫定日本語案: marking up reviews と ratings とともに schema.org vocabulary と する recognize it 向けに 暫定日本語案: enhanced results, と it validates annotated データ against declared type と 暫定日本語案: expected format (mismatches get ignored rather than hard-rejected). ただし Bing has 暫定日本語案: ない published equivalent へ Google’s 2019 self-serving-reviews crackdown — 暫定日本語案: there’s no Bing-specific Review 適格性 ページ comparable へ Google’s. Practically: 暫定日本語案: treat Google’s Review/AggregateRating doc as de facto standard even 向けに 暫定日本語案: Bing-focused 機能, because Bing points back へ 同じ schema.org vocabulary 暫定日本語案: なしで adding its own restrictions.

暫定日本語案: 向けに どこ Review fits in wider picture, it sits alongside AggregateRating, 暫定日本語案: 商品, と Organization schema siblings 下で broader structured-データ hub この 暫定日本語案: 記事 nests 以内に.

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