diff --git a/docs/ja-JP/README.md b/docs/ja-JP/README.md
index 9596adb8d..3c772b7bd 100644
--- a/docs/ja-JP/README.md
+++ b/docs/ja-JP/README.md
@@ -110,12 +110,14 @@
 <p align="center" aria-label="Partners and sponsors">
   <a href="https://www.coderabbit.ai" title="CodeRabbit"><img src="../../assets/images/sponsors/coderabbit.png" height="54" alt="CodeRabbit" /></a>&nbsp;&nbsp;&nbsp;
   <a href="https://www.greptile.com/go/ecc" title="Greptile"><img src="../../assets/images/sponsors/greptile.png" height="54" alt="Greptile" /></a>&nbsp;&nbsp;&nbsp;
-  <a href="https://www.atlascloud.ai/?utm_source=github&amp;utm_medium=link&amp;utm_campaign=ECC" title="Atlas Cloud"><picture><source media="(prefers-color-scheme: dark)" srcset="../../assets/images/sponsors/atlascloud-dark.svg" /><img src="../../assets/images/sponsors/atlascloud.svg" width="154" alt="Atlas Cloud" /></picture></a>&nbsp;&nbsp;&nbsp;
   <a href="https://platform.kimi.ai?aff=ecc" title="Moonshot AI - Kimi"><picture><source media="(prefers-color-scheme: dark)" srcset="../../assets/images/sponsors/moonshot-dark.png" /><img src="../../assets/images/sponsors/moonshot.png" width="132" alt="Moonshot AI - Kimi" /></picture></a>&nbsp;&nbsp;&nbsp;
-  <a href="https://compute.itomarkets.com" title="Itô Markets"><picture><source media="(prefers-color-scheme: light)" srcset="../../assets/images/sponsors/ito-transparent-light.png" /><img src="../../assets/images/sponsors/ito-transparent.png" width="96" alt="Itô Markets" /></picture></a>
+  <a href="https://compute.itomarkets.com" title="Itô Markets"><picture><source media="(prefers-color-scheme: light)" srcset="../../assets/images/sponsors/ito-transparent-light.png" /><img src="../../assets/images/sponsors/ito-transparent.png" width="96" alt="Itô Markets" /></picture></a>&nbsp;&nbsp;&nbsp;
+  <a href="https://serpapi.com/github-ecc" title="SerpApi: Web Search API"><picture><source media="(prefers-color-scheme: dark)" srcset="../../assets/images/sponsors/serpapi-logo-dark-mode.svg" /><img src="../../assets/images/sponsors/serpapi-logo-light-mode.svg" width="200" alt="SerpApi: Web Search API" /></picture></a>
 </p>
 
-<sub><strong>コミュニティスポンサー:</strong> <a href="https://github.com/mikejmorgan-ai">Mike Morgan</a> · <a href="https://github.com/jasonwu513">@jasonwu513</a> · <a href="https://github.com/1anter">@1anter</a> · <a href="https://github.com/massimotodaro">@massimotodaro</a> · <a href="https://github.com/meadmccabe">@meadmccabe</a></sub>
+<sub><strong>過去のスポンサー:</strong> <a href="https://www.atlascloud.ai/?utm_source=github&amp;utm_medium=link&amp;utm_campaign=ECC">Atlas Cloud</a> · <a href="https://github.com/mikejmorgan-ai">Mike Morgan (inactive)</a></sub>
+
+<sub><strong>コミュニティスポンサー:</strong> <a href="https://github.com/jasonwu513">@jasonwu513</a> · <a href="https://github.com/1anter">@1anter</a> · <a href="https://github.com/massimotodaro">@massimotodaro</a> · <a href="https://github.com/meadmccabe">@meadmccabe</a></sub>
 
 <sub><a href="https://github.com/sponsors/affaan-m"><strong>スポンサーになる</strong></a> · <a href="../../SPONSORS.md">スポンサーティア</a> · <a href="../../SPONSORING.md">スポンサーシッププログラム</a></sub>