diff --git a/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/data_quality_summary/ilm_phase_filter/index.tsx b/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/data_quality_summary/ilm_phase_filter/index.tsx
index 4a7c55ac445bf..8290c674730dd 100644
--- a/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/data_quality_summary/ilm_phase_filter/index.tsx
+++ b/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/data_quality_summary/ilm_phase_filter/index.tsx
@@ -25,17 +25,24 @@ import {
 import { useDataQualityContext } from '../../data_quality_context';
 import { formControlLayoutCss, optionCss, optionLabelCss } from './styles';
 
+const getPhaseKey = (
+  option: EuiComboBoxOptionOption<string | number | string[] | undefined>
+): string => (typeof option.value === 'string' ? option.value : '');
+
 const renderOption = (
   option: EuiComboBoxOptionOption<string | number | string[] | undefined>
-): React.ReactNode => (
-  <EuiToolTip content={`${option.label}: ${getIlmPhaseDescription(option.label)}`}>
-    <div css={optionCss} tabIndex={0}>
-      <span css={optionLabelCss}>{`${option.label}`}</span>
-      {': '}
-      <span>{getIlmPhaseDescription(option.label)}</span>
-    </div>
-  </EuiToolTip>
-);
+): React.ReactNode => {
+  const phaseKey = getPhaseKey(option);
+  return (
+    <EuiToolTip content={`${option.label}: ${getIlmPhaseDescription(phaseKey)}`}>
+      <div css={optionCss} tabIndex={0}>
+        <span css={optionLabelCss}>{`${option.label}`}</span>
+        {': '}
+        <span>{getIlmPhaseDescription(phaseKey)}</span>
+      </div>
+    </EuiToolTip>
+  );
+};
 
 const IlmPhaseFilterComponent: React.FC = () => {
   const { selectedIlmPhaseOptions, setSelectedIlmPhaseOptions } = useDataQualityContext();
@@ -64,6 +71,7 @@ const IlmPhaseFilterComponent: React.FC = () => {
           selectedOptions={selectedIlmPhaseOptions}
           options={ilmPhaseOptionsStatic}
           onChange={handleSetSelectedOptions}
+          aria-label={ILM_PHASE}
         />
       </EuiFormControlLayout>
     </EuiToolTip>
diff --git a/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/index.tsx b/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/index.tsx
index 9968080bf35ca..e33ac48926e04 100644
--- a/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/index.tsx
+++ b/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/index.tsx
@@ -20,6 +20,7 @@ import { IndicesCheckContext } from './contexts/indices_check_context';
 import { useIndicesCheck } from './hooks/use_indices_check';
 import { useResultsRollup } from './hooks/use_results_rollup';
 import { ilmPhaseOptionsStatic, EMPTY_STAT } from './constants';
+import { ilmPhasesFromSelectedOptions } from './utils/ilm_phases_from_selected_options';
 import { DataQualitySummary } from './data_quality_summary';
 import { DataQualityDetails } from './data_quality_details';
 
@@ -104,7 +105,7 @@ const DataQualityPanelComponent: React.FC<Props> = ({
     [toasts]
   );
   const ilmPhases: string[] = useMemo(
-    () => selectedIlmPhaseOptions.map(({ label }) => label),
+    () => ilmPhasesFromSelectedOptions(selectedIlmPhaseOptions),
     [selectedIlmPhaseOptions]
   );
 
diff --git a/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/utils/ilm_phases_from_selected_options.test.ts b/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/utils/ilm_phases_from_selected_options.test.ts
new file mode 100644
index 0000000000000..3a8521150b404
--- /dev/null
+++ b/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/utils/ilm_phases_from_selected_options.test.ts
@@ -0,0 +1,40 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import type { EuiComboBoxOptionOption } from '@elastic/eui';
+
+import { ilmPhasesFromSelectedOptions } from './ilm_phases_from_selected_options';
+
+describe('ilmPhasesFromSelectedOptions', () => {
+  it('returns English phase values when labels are localized (ja-JP / i18n regression)', () => {
+    const selected: EuiComboBoxOptionOption[] = [
+      { label: 'ホット', value: 'hot' },
+      { label: 'ウォーム', value: 'warm' },
+      { label: '管理対象外', value: 'unmanaged' },
+    ];
+
+    expect(ilmPhasesFromSelectedOptions(selected)).toEqual(['hot', 'warm', 'unmanaged']);
+  });
+
+  it('returns values when labels match English defaults', () => {
+    const selected: EuiComboBoxOptionOption[] = [
+      { label: 'hot', value: 'hot' },
+      { label: 'warm', value: 'warm' },
+    ];
+
+    expect(ilmPhasesFromSelectedOptions(selected)).toEqual(['hot', 'warm']);
+  });
+
+  it('drops options without a string value', () => {
+    const selected: EuiComboBoxOptionOption[] = [
+      { label: 'hot', value: 'hot' },
+      { label: 'broken' },
+    ];
+
+    expect(ilmPhasesFromSelectedOptions(selected)).toEqual(['hot']);
+  });
+});
diff --git a/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/utils/ilm_phases_from_selected_options.ts b/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/utils/ilm_phases_from_selected_options.ts
new file mode 100644
index 0000000000000..05f892432352e
--- /dev/null
+++ b/x-pack/solutions/security/packages/ecs-data-quality-dashboard/impl/data_quality_panel/utils/ilm_phases_from_selected_options.ts
@@ -0,0 +1,19 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import type { EuiComboBoxOptionOption } from '@elastic/eui';
+
+/**
+ * Returns canonical ILM phase values for filtering (matches `getIlmPhase` output).
+ * Uses option `value`, not localized `label`, so non-English locales keep working.
+ */
+export const ilmPhasesFromSelectedOptions = (
+  selectedIlmPhaseOptions: EuiComboBoxOptionOption[]
+): string[] =>
+  selectedIlmPhaseOptions
+    .map(({ value }) => value)
+    .filter((v): v is string => typeof v === 'string');