diff --git a/src-core/src/db.rs b/src-core/src/db.rs
index 36efec1..2abf611 100644
--- a/src-core/src/db.rs
+++ b/src-core/src/db.rs
@@ -7,7 +7,7 @@ use std::{
     },
 };
 
-use anyhow::Result;
+use anyhow::{Ok, Result};
 use rusqlite::Connection;
 
 mod yomitan;
@@ -46,8 +46,17 @@ impl Database {
         })
     }
 
-    pub fn is_yomitan_dbfile_exists(&self) -> bool {
-        self.dir.join(YOMITAN_DBFILE).exists()
+    pub fn is_yomitan_dbfile_init(&self) -> Result<bool> {
+        let yomitan_db_path = self.dir.join(YOMITAN_DBFILE);
+
+        if yomitan_db_path.exists() {
+            return Ok(false);
+        }
+
+        let conn = Connection::open(yomitan_db_path)?;
+        let mut stmt = conn.prepare("SELECT 1 FROM dictionaries")?;
+
+        Ok(stmt.exists([])?)
     }
 
     pub fn yomitan(&self) -> Result<yomitan::YomitanDatabase> {
diff --git a/src-core/src/service.rs b/src-core/src/service.rs
index adce4b7..4cbe64e 100644
--- a/src-core/src/service.rs
+++ b/src-core/src/service.rs
@@ -20,8 +20,8 @@ impl AppService {
         Ok(Self { db })
     }
 
-    pub fn is_yomitan_setup_yet(&self) -> bool {
-        self.db.is_yomitan_dbfile_exists()
+    pub fn is_yomitan_setup_yet(&self) -> Result<bool, CJDicError> {
+        Ok(self.db.is_yomitan_dbfile_init()?)
     }
 
     pub fn search_yomitan(
diff --git a/src-tauri/src/command.rs b/src-tauri/src/command.rs
index 3d84aea..5cf4291 100644
--- a/src-tauri/src/command.rs
+++ b/src-tauri/src/command.rs
@@ -2,8 +2,8 @@
 use cjdic2_core::{AppService, YomitanRow};
 
 #[tauri::command]
-pub fn is_yomitan_setup_yet(state: tauri::State<AppService>) -> bool {
-    state.is_yomitan_setup_yet()
+pub fn is_yomitan_setup_yet(state: tauri::State<AppService>) -> Result<bool, String> {
+    state.is_yomitan_setup_yet().map_err(|e| e.to_string())
 }
 
 #[tauri::command]