diff --git a/app/features/tournament/tournament-schemas.server.ts b/app/features/tournament/tournament-schemas.server.ts
index dc50520cc..26b2d80c3 100644
--- a/app/features/tournament/tournament-schemas.server.ts
+++ b/app/features/tournament/tournament-schemas.server.ts
@@ -163,7 +163,9 @@ export const adminActionSchema = z.union([
 	}),
 	z.object({
 		_action: _action("UPDATE_IN_GAME_NAME"),
-		inGameNameText: z.string().max(USER.IN_GAME_NAME_TEXT_MAX_LENGTH),
+		inGameNameText: z
+			.string()
+			.refine((val) => [...val].length <= USER.IN_GAME_NAME_TEXT_MAX_LENGTH),
 		inGameNameDiscriminator: z
 			.string()
 			.refine((val) => /^[0-9a-z]{4,5}$/.test(val)),
diff --git a/app/features/user-page/user-page-constants.test.ts b/app/features/user-page/user-page-constants.test.ts
index bffba2a92..ed9c25735 100644
--- a/app/features/user-page/user-page-constants.test.ts
+++ b/app/features/user-page/user-page-constants.test.ts
@@ -10,6 +10,7 @@ describe("IN_GAME_NAME_REGEXP", () => {
 			"A#1234",
 			"Player#abcd",
 			"名前テスト1234#ab12c",
+			"☆CR☆Sh𝓔𝓔p!#1234",
 		];
 
 		for (const name of validNames) {
@@ -28,6 +29,7 @@ describe("IN_GAME_NAME_REGEXP", () => {
 			"Sendou#123456",
 			"Sendou#ABCD",
 			"12345678901#1234",
+			"𝓔𝓔𝓔𝓔𝓔𝓔𝓔𝓔𝓔𝓔𝓔#1234",
 		];
 
 		for (const name of invalidNames) {
diff --git a/app/features/user-page/user-page-constants.ts b/app/features/user-page/user-page-constants.ts
index 3dd0d98d3..da12fe0eb 100644
--- a/app/features/user-page/user-page-constants.ts
+++ b/app/features/user-page/user-page-constants.ts
@@ -18,7 +18,7 @@ export const USER = {
 	GAME_BADGES_SMALL_MAX: 4,
 };
 
-export const IN_GAME_NAME_REGEXP = /^.{1,10}#[0-9a-z]{4,5}$/;
+export const IN_GAME_NAME_REGEXP = /^.{1,10}#[0-9a-z]{4,5}$/u;
 
 export const MATCHES_PER_SEASONS_PAGE = 8;
 export const RESULTS_PER_PAGE = 25;
diff --git a/app/features/user-page/user-page-schemas.ts b/app/features/user-page/user-page-schemas.ts
index e4409a096..244a98ae1 100644
--- a/app/features/user-page/user-page-schemas.ts
+++ b/app/features/user-page/user-page-schemas.ts
@@ -101,7 +101,10 @@ export const userEditProfileBaseSchema = z.object({
 	inGameName: textFieldOptional({
 		label: "labels.profileInGameName",
 		bottomText: "bottomTexts.profileInGameName",
-		maxLength: 10 + 1 + 5, // 10 for name, 1 for #, 5 for discriminator
+		maxLength:
+			USER.IN_GAME_NAME_TEXT_MAX_LENGTH +
+			1 +
+			USER.IN_GAME_NAME_DISCRIMINATOR_MAX_LENGTH,
 		regExp: {
 			pattern: IN_GAME_NAME_REGEXP,
 			message: "forms:errors.profileInGameName",