Stage 4.1: remove remaining Japanese delivery field keys

tasks/pbf/mappings/navsea_field_name_rules_v1.yaml

@@ -121,3 +121,38 @@ rules:
     keep_in_engineering: true
     normalization_class: numeric_normalization
     notes: Legacy angle string is normalized into bearing_deg.
+  - field_name_jp: ローマ字名称
+    field_name_std: name_romaji
+    field_group: labels
+    keep_in_delivery: true
+    keep_in_engineering: true
+    normalization_class: content_text
+    notes: Romaji place or object name remains available as normalized content text.
+  - field_name_jp: 目的分類番号
+    field_name_std: purpose_class_code
+    field_group: source_legacy
+    keep_in_delivery: true
+    keep_in_engineering: true
+    normalization_class: legacy_render_code
+    notes: Legacy purpose code is preserved under a standardized key.
+  - field_name_jp: 縮尺選択コード
+    field_name_std: scale_selection_code
+    field_group: source_legacy
+    keep_in_delivery: true
+    keep_in_engineering: true
+    normalization_class: legacy_render_code
+    notes: Legacy scale-selection code is preserved under a standardized key.
+  - field_name_jp: 表示重要度
+    field_name_std: display_priority_code
+    field_group: source_legacy
+    keep_in_delivery: true
+    keep_in_engineering: true
+    normalization_class: legacy_render_code
+    notes: Legacy display-priority code is preserved under a standardized key.
+  - field_name_jp: Sガイドページ
+    field_name_std: guide_page_ref
+    field_group: source_legacy
+    keep_in_delivery: true
+    keep_in_engineering: true
+    normalization_class: content_text
+    notes: Legacy guide-page reference is preserved under a standardized key.