diff --git a/locales/ja.yml b/locales/ja.yml
index 03719d745a..ccd18855bc 100644
--- a/locales/ja.yml
+++ b/locales/ja.yml
@@ -1133,6 +1133,7 @@ mobile/views/components/timeline.vue:
 
 mobile/views/components/ui.header.vue:
   welcome-back: "おかえりなさい、"
+  adjective: "さん"
 
 mobile/views/components/ui.nav.vue:
   timeline: "タイムライン"
diff --git a/src/client/app/mobile/views/components/ui.header.vue b/src/client/app/mobile/views/components/ui.header.vue
index 794ec9a307..63399f7465 100644
--- a/src/client/app/mobile/views/components/ui.header.vue
+++ b/src/client/app/mobile/views/components/ui.header.vue
@@ -3,7 +3,7 @@
 	<mk-special-message/>
 	<div class="main" ref="main">
 		<div class="backdrop"></div>
-		<p ref="welcomeback" v-if="$store.getters.isSignedIn">%i18n:@welcome-back%<b>{{ $store.state.i | userName }}</b>さん</p>
+		<p ref="welcomeback" v-if="$store.getters.isSignedIn">%i18n:@welcome-back%<b>{{ $store.state.i | userName }}</b>%i18n:@adjective%</p>
 		<div class="content" ref="mainContainer">
 			<button class="nav" @click="$parent.isDrawerOpening = true">%fa:bars%</button>
 			<template v-if="hasUnreadNotification || hasUnreadMessagingMessage || hasGameInvitation">%fa:circle%</template>