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<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
        xmlns:xhtml="http://www.w3.org/1999/xhtml">
  <!--
    ADR-0771: 多言語サイトマップ（単一統合 + hreflang 方式）

    Litra.ai の URL 構造:
    - 英語版: ルート直下（/, /pricing 等）
    - 日本語版: /ja/ プレフィックス付き
    - /lp は / に、/ja/lp は /ja/ に Nginx で 301 リダイレクト

    参照仕様:
    - Google Search Central: Localized versions of your pages
      https://developers.google.com/search/docs/specialty/international/localized-versions
    - sitemap-en.xml は ADR-0771 で廃止（業界実績ゼロ・Google公式と整合しない）

    重要なルール:
    - 自己参照必須: en/ja の両 URL に、両方の hreflang を書く
    - 双方向必須: 英語ページに ja版 URL を書くなら、日本語ページにも en版 URL を書く
    - x-default は英語版を指す（Anthropic 方式と整合）
    - 翻訳がないページ（/research/*）は hreflang を書かない
  -->

  <!-- ========== トップページ（LP） ========== -->
  <url>
    <loc>https://litra-ai.com/</loc>
    <lastmod>2026-05-08</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/</loc>
    <lastmod>2026-04-24</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/"/>
  </url>

  <!-- ========== /pricing ========== -->
  <url>
    <loc>https://litra-ai.com/pricing</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/pricing"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/pricing"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/pricing"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/pricing</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/pricing"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/pricing"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/pricing"/>
  </url>

  <!-- ========== /about ========== -->
  <url>
    <loc>https://litra-ai.com/about</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/about"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/about"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/about"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/about</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/about"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/about"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/about"/>
  </url>

  <!-- ========== /faq ========== -->
  <url>
    <loc>https://litra-ai.com/faq</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/faq"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/faq"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/faq"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/faq</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/faq"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/faq"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/faq"/>
  </url>

  <!-- ========== /terms (ADR-0715で住所変更 → 2026-04-24) ========== -->
  <url>
    <loc>https://litra-ai.com/terms</loc>
    <lastmod>2026-04-24</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/terms"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/terms"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/terms"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/terms</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/terms"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/terms"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/terms"/>
  </url>

  <!-- ========== /privacy ========== -->
  <url>
    <loc>https://litra-ai.com/privacy</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/privacy"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/privacy"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/privacy"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/privacy</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/privacy"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/privacy"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/privacy"/>
  </url>

  <!-- ========== /commercial-disclosure (ADR-0715で住所変更 → 2026-04-24) ========== -->
  <url>
    <loc>https://litra-ai.com/commercial-disclosure</loc>
    <lastmod>2026-04-24</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/commercial-disclosure"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/commercial-disclosure"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/commercial-disclosure"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/commercial-disclosure</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/commercial-disclosure"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/commercial-disclosure"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/commercial-disclosure"/>
  </url>

  <!-- ========== /contact ========== -->
  <url>
    <loc>https://litra-ai.com/contact</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/contact"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/contact"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/contact"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/contact</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/contact"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/contact"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/contact"/>
  </url>

  <!-- ========== /changelog ========== -->
  <url>
    <loc>https://litra-ai.com/changelog</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/changelog"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/changelog"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/changelog"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/changelog</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/changelog"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/changelog"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/changelog"/>
  </url>

  <!-- ========== /compare/* ========== -->
  <url>
    <loc>https://litra-ai.com/compare/google-scholar</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/compare/google-scholar"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/compare/google-scholar"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/compare/google-scholar"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/compare/google-scholar</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/compare/google-scholar"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/compare/google-scholar"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/compare/google-scholar"/>
  </url>
  <url>
    <loc>https://litra-ai.com/compare/elicit</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/compare/elicit"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/compare/elicit"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/compare/elicit"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/compare/elicit</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/compare/elicit"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/compare/elicit"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/compare/elicit"/>
  </url>
  <url>
    <loc>https://litra-ai.com/compare/consensus</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/compare/consensus"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/compare/consensus"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/compare/consensus"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/compare/consensus</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/compare/consensus"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/compare/consensus"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/compare/consensus"/>
  </url>
  <url>
    <loc>https://litra-ai.com/compare/japanese-tools</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/compare/japanese-tools"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/compare/japanese-tools"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/compare/japanese-tools"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/compare/japanese-tools</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/compare/japanese-tools"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/compare/japanese-tools"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/compare/japanese-tools"/>
  </url>

  <!-- ========== /developers ========== -->
  <url>
    <loc>https://litra-ai.com/developers</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/developers"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/developers"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/developers"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/developers</loc>
    <lastmod>2026-04-24</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/developers"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/developers"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/developers"/>
  </url>

  <!-- ========== /beta ========== -->
  <url>
    <loc>https://litra-ai.com/beta</loc>
    <lastmod>2026-02-27</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/beta"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/beta"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/beta"/>
  </url>
  <url>
    <loc>https://litra-ai.com/ja/beta</loc>
    <lastmod>2026-04-24</lastmod>
    <xhtml:link rel="alternate" hreflang="en" href="https://litra-ai.com/beta"/>
    <xhtml:link rel="alternate" hreflang="ja" href="https://litra-ai.com/ja/beta"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://litra-ai.com/beta"/>
  </url>

  <!--
    ADR-0771: /invited (リファラル紹介ランディング、ADR-0706) は sitemap から除外
    理由: /invited は noindex,nofollow 指定。Google公式仕様で sitemap には
    noindex ページを含めない(業界標準: Stripe/Notion/Dropbox/Slack も同様)。
  -->

  <!-- ========== 英語のみのページ (research、ADR-0771で追加) ==========
       日本語版が無いページは hreflang を書かない（Google公式仕様準拠） -->
  <url>
    <loc>https://litra-ai.com/research/ai-paper-search-tools-2026</loc>
    <lastmod>2026-05-08</lastmod>
  </url>
</urlset>
