<?xml version="1.0" encoding="UTF-8"?>
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"
        xmlns:xhtml="http://www.w3.org/1999/xhtml">

  <!-- トップページ (JA / EN) -->
  <url>
    <loc>https://idasfilters.com/</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>weekly</changefreq>
    <priority>1.0</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/"/>
  </url>

  <!-- 主力フィルター製品詳細 (JA) -->
  <url>
    <loc>https://idasfilters.com/products/nbz-ii.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/nbz-ii.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/nbz-ii.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/nbz-ii.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/products/dtd.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/dtd.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/dtd.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/dtd.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/products/gnb.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/gnb.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/gnb.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/gnb.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/products/ngs1.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/ngs1.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/ngs1.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/ngs1.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/products/heuib-ii.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/heuib-ii.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/heuib-ii.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/heuib-ii.html"/>
  </url>

  <!-- 主力フィルター製品詳細 (EN) -->
  <url>
    <loc>https://idasfilters.com/en/products/nbz-ii.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/nbz-ii.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/nbz-ii.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/nbz-ii.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/products/dtd.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/dtd.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/dtd.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/dtd.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/products/gnb.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/gnb.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/gnb.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/gnb.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/products/ngs1.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/ngs1.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/ngs1.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/ngs1.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/products/heuib-ii.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.9</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/heuib-ii.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/heuib-ii.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/heuib-ii.html"/>
  </url>

  <!-- マウント別一覧 (JA) -->
  <url>
    <loc>https://idasfilters.com/products/m48.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/m48.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/m48.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/m48.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/products/m54.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/m54.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/m54.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/m54.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/products/m42.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/m42.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/m42.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/m42.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/products/dz.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/dz.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/dz.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/dz.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/products/drt.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/drt.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/drt.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/drt.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/products/ca.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/ca.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/ca.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/ca.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/products/ds.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/ds.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/ds.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/ds.html"/>
  </url>

  <!-- マウント別一覧 (EN) -->
  <url>
    <loc>https://idasfilters.com/en/products/m48.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/m48.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/m48.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/m48.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/products/m54.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/m54.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/m54.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/m54.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/products/m42.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/m42.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/m42.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/m42.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/products/dz.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/dz.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/dz.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/dz.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/products/drt.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/drt.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/drt.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/drt.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/products/ca.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/ca.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/ca.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/ca.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/products/ds.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/products/ds.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/products/ds.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/products/ds.html"/>
  </url>

  <!-- 天体改造カメラ本体 (JA) -->
  <url>
    <loc>https://idasfilters.com/products/eos-r8-mod.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://idasfilters.com/products/eos-r50v-mod.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://idasfilters.com/products/eos-r50-mod.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>
  <url>
    <loc>https://idasfilters.com/products/eos-r100-mod.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.85</priority>
  </url>

  <!-- カメラ用適合フィルター (JA) -->
  <url>
    <loc>https://idasfilters.com/products/r8.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>
  <url>
    <loc>https://idasfilters.com/products/r50v.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.8</priority>
  </url>

  <!-- 取扱説明書・分光透過率証明 (JA / EN) -->
  <url>
    <loc>https://idasfilters.com/manuals.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/manuals.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/manuals.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/manuals.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/manuals.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/manuals.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/manuals.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/manuals.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/cert/</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/cert/"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/cert/en/"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/cert/en/"/>
  </url>
  <url>
    <loc>https://idasfilters.com/cert/en/</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.75</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/cert/"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/cert/en/"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/cert/en/"/>
  </url>
  <url>
    <loc>https://idasfilters.com/idas_stock/</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>daily</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/idas_stock/"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/idas_stock/en/"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/idas_stock/en/"/>
  </url>
  <url>
    <loc>https://idasfilters.com/idas_stock/en/</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>daily</changefreq>
    <priority>0.8</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/idas_stock/"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/idas_stock/en/"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/idas_stock/en/"/>
  </url>
  <url>
    <loc>https://idasfilters.com/contact.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/contact.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/contact.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/contact.html"/>
  </url>
  <url>
    <loc>https://idasfilters.com/en/contact.html</loc>
    <lastmod>2026-11-03</lastmod>
    <changefreq>monthly</changefreq>
    <priority>0.7</priority>
    <xhtml:link rel="alternate" hreflang="ja" href="https://idasfilters.com/contact.html"/>
    <xhtml:link rel="alternate" hreflang="en" href="https://idasfilters.com/en/contact.html"/>
    <xhtml:link rel="alternate" hreflang="x-default" href="https://idasfilters.com/en/contact.html"/>
  </url>
</urlset>
