diff --git a/voicevox-remotion-template/scripts/voicevox-generate.js b/voicevox-remotion-template/scripts/voicevox-generate.js
index 6d1a0fb..8f0e8b7 100644
--- a/voicevox-remotion-template/scripts/voicevox-generate.js
+++ b/voicevox-remotion-template/scripts/voicevox-generate.js
@@ -381,8 +381,9 @@
 
     const voice = resolveVoice(characters, speech);
     const speakerId = resolveSpeakerId(speakers, voice, speech.id);
+    const textForVoice = speech.readAs ?? speech.text;
     const queryResponse = await fetch(
-      `${VOICEVOX_URL}/audio_query?text=${encodeURIComponent(speech.text)}&speaker=${speakerId}`,
+      `${VOICEVOX_URL}/audio_query?text=${encodeURIComponent(textForVoice)}&speaker=${speakerId}`,
       {method: "POST"}
     );
     if (!queryResponse.ok) {
diff --git a/voicevox-remotion-template/src/data/pizza-kiln/script.ts b/voicevox-remotion-template/src/data/pizza-kiln/script.ts
index d594512..dbd90e6 100644
--- a/voicevox-remotion-template/src/data/pizza-kiln/script.ts
+++ b/voicevox-remotion-template/src/data/pizza-kiln/script.ts
@@ -6,7 +6,7 @@
   type VQTimelineEvent,
   type VQTimelineInputEvent,
   type VQVideoEvent,
-} from "../../lib/VQRemotionLib";
+} from "../../lib/VQRemotionLib/timeline";
 import type {CharacterId, VoicevoxVoice} from "./characters";
 
 export {characters} from "./characters";
diff --git a/voicevox-remotion-template/src/data/pizza-kiln/timing.ts b/voicevox-remotion-template/src/data/pizza-kiln/timing.ts
index d798033..b833636 100644
--- a/voicevox-remotion-template/src/data/pizza-kiln/timing.ts
+++ b/voicevox-remotion-template/src/data/pizza-kiln/timing.ts
@@ -43,7 +43,8 @@
     return Math.max(1, Math.ceil(entry.durationSeconds * fps));
   }
 
-  const estimatedSeconds = Math.max(1.2, speech.text.length * 0.11);
+  const textForEstimate = speech.readAs ?? speech.text;
+  const estimatedSeconds = Math.max(1.2, textForEstimate.length * 0.11);
   return Math.ceil(estimatedSeconds * fps);
 };
 
diff --git a/voicevox-remotion-template/src/data/pizza-oven-project-01/script.ts b/voicevox-remotion-template/src/data/pizza-oven-project-01/script.ts
index 501a9f2..0702536 100644
--- a/voicevox-remotion-template/src/data/pizza-oven-project-01/script.ts
+++ b/voicevox-remotion-template/src/data/pizza-oven-project-01/script.ts
@@ -6,7 +6,7 @@
   type VQSpeechEvent,
   type VQTimelineEvent,
   type VQTimelineInputEvent,
-} from "../../lib/VQRemotionLib";
+} from "../../lib/VQRemotionLib/timeline";
 import type {CharacterId, VoicevoxVoice} from "./characters";
 
 export {characters} from "./characters";
@@ -31,7 +31,9 @@
       fit: "cover",
     }
   ),
-  say("pizza-oven-project-01-sayo-004", "sayo", "ピザ窯を。"),
+  say("pizza-oven-project-01-sayo-004", "sayo", "ピザ窯を。", {
+    readAs: "ぴざがまを。",
+  }),
   wait(1),
   say("pizza-oven-project-01-sayo-005", "sayo", "まずはblender上で、耐熱レンガの寸法を元に積み方を設計することにしました。"),
 ] satisfies readonly TimelineInputEvent[]);
diff --git a/voicevox-remotion-template/src/data/pizza-oven-project-01/timing.ts b/voicevox-remotion-template/src/data/pizza-oven-project-01/timing.ts
index 910e675..a9ce930 100644
--- a/voicevox-remotion-template/src/data/pizza-oven-project-01/timing.ts
+++ b/voicevox-remotion-template/src/data/pizza-oven-project-01/timing.ts
@@ -45,7 +45,8 @@
     return Math.max(1, Math.ceil(speech.durationSeconds * fps));
   }
 
-  const estimatedSeconds = Math.max(1.2, speech.text.length * 0.11);
+  const textForEstimate = speech.readAs ?? speech.text;
+  const estimatedSeconds = Math.max(1.2, textForEstimate.length * 0.11);
   return Math.ceil(estimatedSeconds * fps);
 };
 
diff --git a/voicevox-remotion-template/src/data/pizza-oven-project-01/voicevox-manifest.json b/voicevox-remotion-template/src/data/pizza-oven-project-01/voicevox-manifest.json
index 42182ce..f1c08c3 100644
--- a/voicevox-remotion-template/src/data/pizza-oven-project-01/voicevox-manifest.json
+++ b/voicevox-remotion-template/src/data/pizza-oven-project-01/voicevox-manifest.json
@@ -33,7 +33,7 @@
     "styleName": "ノーマル",
     "speakerId": 46,
     "file": "audio/pizza-oven-project-01/lines/pizza-oven-project-01-sayo-004.wav",
-    "durationSeconds": 1.0133333333333334
+    "durationSeconds": 0.992
   },
   {
     "id": "pizza-oven-project-01-sayo-005",
diff --git a/voicevox-remotion-template/src/data/yukkuri-composition/script.ts b/voicevox-remotion-template/src/data/yukkuri-composition/script.ts
index 96c372e..1432d42 100644
--- a/voicevox-remotion-template/src/data/yukkuri-composition/script.ts
+++ b/voicevox-remotion-template/src/data/yukkuri-composition/script.ts
@@ -5,7 +5,7 @@
   type VQSpeechEvent,
   type VQTimelineEvent,
   type VQTimelineInputEvent,
-} from "../../lib/VQRemotionLib";
+} from "../../lib/VQRemotionLib/timeline";
 import type {CharacterId, VoicevoxVoice} from "./characters";
 
 export {characters, initialVisibleCharacters} from "./characters";
diff --git a/voicevox-remotion-template/src/data/yukkuri-composition/timing.ts b/voicevox-remotion-template/src/data/yukkuri-composition/timing.ts
index d7daf29..7b98e97 100644
--- a/voicevox-remotion-template/src/data/yukkuri-composition/timing.ts
+++ b/voicevox-remotion-template/src/data/yukkuri-composition/timing.ts
@@ -33,7 +33,8 @@
     return Math.max(1, Math.ceil(entry.durationSeconds * fps));
   }
 
-  const estimatedSeconds = Math.max(1.2, speech.text.length * 0.11);
+  const textForEstimate = speech.readAs ?? speech.text;
+  const estimatedSeconds = Math.max(1.2, textForEstimate.length * 0.11);
   return Math.ceil(estimatedSeconds * fps);
 };
 
diff --git a/voicevox-remotion-template/src/lib/VQRemotionLib/timeline.ts b/voicevox-remotion-template/src/lib/VQRemotionLib/timeline.ts
index 678d979..45d6083 100644
--- a/voicevox-remotion-template/src/lib/VQRemotionLib/timeline.ts
+++ b/voicevox-remotion-template/src/lib/VQRemotionLib/timeline.ts
@@ -1,5 +1,6 @@
 export type VQSpeechOptions<Voice = unknown> = Readonly<{
   subtitle?: string;
+  readAs?: string;
   voicevox?: Partial<Voice>;
   durationSeconds?: number;
 }>;
@@ -13,6 +14,7 @@
   character: CharacterId;
   text: string;
   subtitle?: string;
+  readAs?: string;
   voicevox?: Partial<Voice>;
   durationSeconds?: number;
 }>;
@@ -117,7 +119,7 @@
 
 // 用途: VOICEVOX発話をタイムラインイベントとして定義する。
 // 使用方法: script.ts の timeline 内で say("id", "character", "text", options) として呼び出す。
-// オプションや引数詳細: options には字幕・VOICEVOX上書き・音声未生成時の秒数を指定できる。
+// オプションや引数詳細: options には字幕・読み上げ用テキスト・VOICEVOX上書き・音声未生成時の秒数を指定できる。
 export const say = <CharacterId extends string, Voice = unknown>(
   id: string,
   character: CharacterId,
diff --git a/voicevox-remotion-template/src/lib/VQRemotionLib/types.ts b/voicevox-remotion-template/src/lib/VQRemotionLib/types.ts
index 11dcaa0..eb1e455 100644
--- a/voicevox-remotion-template/src/lib/VQRemotionLib/types.ts
+++ b/voicevox-remotion-template/src/lib/VQRemotionLib/types.ts
@@ -53,6 +53,7 @@
 export type VQSpeechEventLike = Readonly<{
   text: string;
   subtitle?: string;
+  readAs?: string;
 }>;
 
 export type VQMouthResolverContext<CharacterId extends string = string> =