diff --git a/apps/cmd-ime-swift/Sources/CmdIMESwift/InputSourceSwitcher.swift b/apps/cmd-ime-swift/Sources/CmdIMESwift/InputSourceSwitcher.swift
index 5de80b5..8e7cf13 100644
--- a/apps/cmd-ime-swift/Sources/CmdIMESwift/InputSourceSwitcher.swift
+++ b/apps/cmd-ime-swift/Sources/CmdIMESwift/InputSourceSwitcher.swift
@@ -71,33 +71,52 @@ enum InputSourceSwitcher {
         }
     }
 
-    /// Finds an enabled input source whose languages include "ja", preferring
-    /// the standard Hiragana input mode (`com.apple.inputmethod.Japanese`)
-    /// when more than one Japanese source is enabled.
-    private static func japaneseInputSource() -> TISInputSource? {
-        let conditions = [kTISPropertyInputSourceIsEnabled as String: true] as CFDictionary
+    /// Finds an enabled keyboard input source whose languages include "ja",
+    /// preferring the standard Hiragana input mode
+    /// (`com.apple.inputmethod.Japanese`) when more than one is enabled.
+    ///
+    /// Internal (not private) so the regression test can assert the picked
+    /// source is a keyboard input source, never a palette.
+    static func japaneseInputSource() -> TISInputSource? {
+        // Restrict to the keyboard category: language "ja" alone also matches
+        // palette input sources (e.g. the 50-on Kana Palette), and selecting
+        // one of those opens a floating palette window instead of switching
+        // the IME (v2.4.7 regression).
+        let conditions = [
+            kTISPropertyInputSourceIsEnabled as String: true,
+            kTISPropertyInputSourceCategory as String: kTISCategoryKeyboardInputSource as String
+        ] as CFDictionary
         guard let cfList = TISCreateInputSourceList(conditions, false)?.takeRetainedValue() else {
             return nil
         }
         let sources = (cfList as NSArray) as? [TISInputSource] ?? []
 
         let japaneseSources = sources.filter { source in
-            guard let languages = inputSourceLanguages(source) else { return false }
+            guard isSelectCapable(source), let languages = inputSourceLanguages(source) else { return false }
             return languages.contains("ja")
         }
 
-        if let hiragana = japaneseSources.first(where: { inputSourceID($0) == "com.apple.inputmethod.Japanese" }) {
+        // Prefer the Hiragana input mode; its *mode* ID is
+        // "com.apple.inputmethod.Japanese" while the input source ID carries
+        // an IME-specific prefix (e.g. "…Kotoeri.RomajiTyping.Japanese"), so
+        // match on the mode ID.
+        if let hiragana = japaneseSources.first(where: { inputModeID($0) == "com.apple.inputmethod.Japanese" }) {
             return hiragana
         }
 
         return japaneseSources.first
     }
 
-    private static func inputSourceID(_ source: TISInputSource) -> String? {
-        guard let ptr = TISGetInputSourceProperty(source, kTISPropertyInputSourceID) else { return nil }
+    private static func inputModeID(_ source: TISInputSource) -> String? {
+        guard let ptr = TISGetInputSourceProperty(source, kTISPropertyInputModeID) else { return nil }
         return Unmanaged<CFString>.fromOpaque(ptr).takeUnretainedValue() as String
     }
 
+    private static func isSelectCapable(_ source: TISInputSource) -> Bool {
+        guard let ptr = TISGetInputSourceProperty(source, kTISPropertyInputSourceIsSelectCapable) else { return false }
+        return CFBooleanGetValue(Unmanaged<CFBoolean>.fromOpaque(ptr).takeUnretainedValue())
+    }
+
     private static func inputSourceLanguages(_ source: TISInputSource) -> [String]? {
         guard let ptr = TISGetInputSourceProperty(source, kTISPropertyInputSourceLanguages) else { return nil }
         return Unmanaged<CFArray>.fromOpaque(ptr).takeUnretainedValue() as NSArray as? [String]
diff --git a/apps/cmd-ime-swift/Tests/CmdIMESwiftTests/InputSourceSwitcherTests.swift b/apps/cmd-ime-swift/Tests/CmdIMESwiftTests/InputSourceSwitcherTests.swift
index aebb5c2..96e60ac 100644
--- a/apps/cmd-ime-swift/Tests/CmdIMESwiftTests/InputSourceSwitcherTests.swift
+++ b/apps/cmd-ime-swift/Tests/CmdIMESwiftTests/InputSourceSwitcherTests.swift
@@ -1,4 +1,5 @@
 import XCTest
+import Carbon.HIToolbox
 @testable import CmdIMESwift
 
 final class InputSourceSwitcherTests: XCTestCase {
@@ -17,4 +18,25 @@ final class InputSourceSwitcherTests: XCTestCase {
         XCTAssertFalse(InputSourceSwitcher.shouldSwitchViaTIS(outputKeyCode: 103))
         XCTAssertFalse(InputSourceSwitcher.shouldSwitchViaTIS(outputKeyCode: 105))
     }
+
+    /// Regression test for the v2.4.7 bug where the kana switch selected the
+    /// 50-on Kana Palette (a palette-category input source with language
+    /// "ja"), opening a floating palette window. The picked source must be a
+    /// keyboard input source; when a Japanese IME is enabled, it must be the
+    /// Hiragana input mode.
+    func testJapaneseInputSource_NeverPicksPalette() throws {
+        guard let source = InputSourceSwitcher.japaneseInputSource() else {
+            throw XCTSkip("No enabled Japanese keyboard input source on this machine.")
+        }
+
+        XCTAssertEqual(property(source, kTISPropertyInputSourceCategory),
+                       kTISCategoryKeyboardInputSource as String)
+        XCTAssertEqual(property(source, kTISPropertyInputModeID),
+                       "com.apple.inputmethod.Japanese")
+    }
+
+    private func property(_ source: TISInputSource, _ key: CFString) -> String? {
+        guard let ptr = TISGetInputSourceProperty(source, key) else { return nil }
+        return Unmanaged<CFString>.fromOpaque(ptr).takeUnretainedValue() as String
+    }
 }
diff --git a/manifest.toml b/manifest.toml
index 0086642..a281f66 100644
--- a/manifest.toml
+++ b/manifest.toml
@@ -3,7 +3,7 @@
 [project]
 id = "cmd-ime"
 name = "⌘IME"
-version = "2.4.7"
+version = "2.4.8"
 description = "Lightweight macOS app for switching between alphanumeric and kana input using Command keys"
 authors = ["Kazuki <kazuki@agiletec.jp>"]
 license = "MIT"