diff --git a/README.md b/README.md
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+++ b/README.md
@@ -177,6 +177,7 @@ This section covers data quality for tabular data.
 
 - [Pandas Profiling](https://github.com/pandas-profiling/pandas-profiling) - A tool for generating profile reports from pandas DataFrames. (2016)
 - [DataProfiler](https://github.com/capitalone/DataProfiler) - A Python library for data profiling and data quality validation. (2021)
+- [Spreadsheet Data Quality Audit - Fictional Sample](https://github.com/ja9740913/spreadsheet-data-quality-audit-sample) - A fixed fictional XLSX input with redacted Excel, Markdown, and JSON audit outputs; sample only, not an audit engine. (2026)
 
 ## Time Series Data
 
diff --git a/README_ja.md b/README_ja.md
index 804e2ad..cb600ae 100644
--- a/README_ja.md
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@@ -173,6 +173,7 @@
 
 - [Pandas Profiling](https://github.com/pandas-profiling/pandas-profiling) - pandas DataFrameからプロファイルレポートを生成するツール。(2016)
 - [DataProfiler](https://github.com/capitalone/DataProfiler) - データプロファイリングとデータ品質検証のためのPythonライブラリ。(2021)
+- [Spreadsheet Data Quality Audit - Fictional Sample](https://github.com/ja9740913/spreadsheet-data-quality-audit-sample) - 固定された架空の XLSX 入力と、機密値を除いた Excel、Markdown、JSON 形式の監査出力。サンプルのみで、監査エンジンは含みません。(2026)
 
 ## 時系列データ
 
diff --git a/README_zh.md b/README_zh.md
index 013eba1..6ce2b20 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -174,6 +174,7 @@
 
 - [Pandas Profiling](https://github.com/pandas-profiling/pandas-profiling) - 从pandas DataFrame生成概要报告的工具。(2016)
 - [DataProfiler](https://github.com/capitalone/DataProfiler) - 用于数据分析和数据质量验证的Python库。(2021)
+- [Spreadsheet Data Quality Audit - Fictional Sample](https://github.com/ja9740913/spreadsheet-data-quality-audit-sample) - 一个固定的虚构 XLSX 输入，附有脱敏的 Excel、Markdown 和 JSON 审计输出；仅为样本，不含审计引擎。(2026)
 
 ## 时间序列数据