diff --git a/docs/ChangeLog.md b/docs/ChangeLog.md
index 54da0354..9e8a9127 100644
--- a/docs/ChangeLog.md
+++ b/docs/ChangeLog.md
@@ -369,6 +369,8 @@
 - history: work around broken timestamps in `HISTFILE` (reported by johnyaku) `#D1831` 5ef28eb
 - progcomp: disable `command_not_found_handle` (reported by telometto, wisnoskij) `#D1834` 64d471a d5fe1d1 973ae8c
 - complete: add completion integration with `zoxide` (reported by ferdinandyb) `#D1838` a96bafe
+- util (`modifyOtherKeys`): work around delayed terminal identification `#D1842` XXXXXXX
+  - util (`modifyOtherKeys`): fix a bug that kitty protocol is never activated `#D1842` XXXXXXX
 
 ## Internal changes and fixes
 
diff --git a/note.txt b/note.txt
index 4df17aa6..2694edd3 100644
--- a/note.txt
+++ b/note.txt
@@ -6461,6 +6461,15 @@ bash_tips
     Done (実装ログ)
 -------------------------------------------------------------------------------
 
+2022-07-11
+
+  * kitty の keyboard protocol が有効になっていなかった [#D1842]
+    https://github.com/akinomyoga/ble.sh/issues/209
+
+    返信を書いている時に kitty の振る舞いを確認していて気づいたのだがちゃんと
+    kitty Keyboard Protocol が有効になっていなかった。"push keyboard mode" の分
+    岐の条件が反転していた。
+
 2022-07-10
 
   * complete: "g add newdir/z[TAB]" とするとファイル名が消える [#D1841]
diff --git a/src/util.sh b/src/util.sh
index 76c10c42..f0babeba 100644
--- a/src/util.sh
+++ b/src/util.sh
@@ -6389,6 +6389,8 @@ function ble/term/DA2/notify {
 
     # 外側の端末情報は以降では処理しない
     ((depth)) && return 0
+
+    ble/term/modifyOtherKeys/reset
   fi
 
   blehook/invoke DA2R
@@ -6503,47 +6505,79 @@ bleopt/declare -v term_modifyOtherKeys_external auto
 bleopt/declare -v term_modifyOtherKeys_internal auto
 
 _ble_term_modifyOtherKeys_current=
+_ble_term_modifyOtherKeys_current_method=
+_ble_term_modifyOtherKeys_current_TERM=
 function ble/term/modifyOtherKeys/.update {
-  [[ $1 == "$_ble_term_modifyOtherKeys_current" ]] && return 0
+  [[ $1 == "$_ble_term_modifyOtherKeys_current" ]] &&
+    [[ $1 != 2 || $_ble_term_TERM == "$_ble_term_modifyOtherKeys_current_TERM" ]] &&
+    return 0
 
   # Note: RLogin では modifyStringKeys (\e[>5m) も指定しないと駄目。
   #   また、RLogin は modifyStringKeys にすると S-数字 を
   #   記号に翻訳してくれないので注意。
-  case $_ble_term_TERM in
-  (RLogin:*)
+  local previous=$_ble_term_modifyOtherKeys_current method
+  if [[ $1 == 2 ]]; then
+    case $_ble_term_TERM in
+    (RLogin:*) method=RLogin_modifyStringKeys ;;
+    (kitty:*)
+      local da2r
+      ble/string#split da2r ';' "$_ble_term_DA2R"
+      if ((da2r[2]>=23)); then
+        method=kitty_keyboard_protocol
+      else
+        method=kitty_modifyOtherKeys
+      fi ;;
+    (*)
+      method=modifyOtherKeys ;;
+    esac
+
+    # 別の方式で有効化されている時は先に解除しておく。
+    if ((_ble_term_modifyOtherKeys_current>=2)) &&
+      [[ $method != "$_ble_term_modifyOtherKeys_current_method" ]]
+    then
+      ble/term/modifyOtherKeys/.update 1
+      previous=1
+    fi
+  else
+    method=$_ble_term_modifyOtherKeys_current_method
+  fi
+  _ble_term_modifyOtherKeys_current=$1
+  _ble_term_modifyOtherKeys_current_method=$method
+  _ble_term_modifyOtherKeys_current_TERM=$_ble_term_TERM
+
+  case $method in
+  (RLogin_modifyStringKeys)
     case $1 in
     (0) ble/util/buffer $'\e[>5;0m' ;;
     (1) ble/util/buffer $'\e[>5;1m' ;;
     (2) ble/util/buffer $'\e[>5;1m\e[>5;2m' ;;
-    esac ;;
-  (kitty:*)
-    local da2r
-    ble/string#split da2r ';' "$_ble_term_DA2R"
-    if ((da2r[2]>=23)); then
-      # Note: Kovid removed the support for modifyOtherKeys in kitty 0.24 after
-      #   vim has pointed out the quirk of kitty.  The kitty keyboard mode only
-      #   has push/pop operations so that their numbers need to be balanced.
-      case $1 in
-      (0|1) # pop keyboard mode
-        # When this is empty, ble.sh has not yet pushed any keyboard modes, so
-        # we just ignore the keyboard mode change.
-        [[ $_ble_term_modifyOtherKeys_current ]] || return 0
-
-        ((_ble_term_modifyOtherKeys_current>=2)) &&
-          ble/util/buffer $'\e[<u' ;;
-      (2) # push keyboard mode
-        ((_ble_term_modifyOtherKeys_current>=2)) &&
-          ble/util/buffer $'\e[>1u' ;;
-      esac
-    else
-      # Note #D1549: 1 では無効にならない。変な振る舞い。
-      # Note #D1626: 更に最近の kitty では \e[>4;0m でも駄目で \e[>4m としなければならない様だ。
-      case $1 in
-      (0|1) ble/util/buffer $'\e[>4;0m\e[>4m' ;;
-      (2) ble/util/buffer $'\e[>4;1m\e[>4;2m\e[m' ;;
-      esac
-    fi
-    _ble_term_modifyOtherKeys_current=$1
+    esac
+    ;; # fallback to modifyOtherKeys
+  (kitty_modifyOtherKeys)
+    # Note: kitty has quirks in its implementation of modifyOtherKeys.
+    # Note #D1549: 1 では無効にならない。変な振る舞い。
+    # Note #D1626: 更に最近の kitty では \e[>4;0m でも駄目で \e[>4m としなければならない様だ。
+    case $1 in
+    (0|1) ble/util/buffer $'\e[>4;0m\e[>4m' ;;
+    (2) ble/util/buffer $'\e[>4;1m\e[>4;2m\e[m' ;;
+    esac
+    return 0 ;;
+  (kitty_keyboard_protocol)
+    # Note: Kovid removed the support for modifyOtherKeys in kitty 0.24 after
+    #   vim has pointed out the quirk of kitty.  The kitty keyboard mode only
+    #   has push/pop operations so that their numbers need to be balanced.
+    case $1 in
+    (0|1) # pop keyboard mode
+      # When this is empty, ble.sh has not yet pushed any keyboard modes, so
+      # we just ignore the keyboard mode change.
+      [[ $previous ]] || return 0
+
+      ((previous>=2)) &&
+        ble/util/buffer $'\e[<u' ;;
+    (2) # push keyboard mode
+      ((previous>=2)) ||
+        ble/util/buffer $'\e[>1u' ;;
+    esac
     return 0 ;;
   esac
 
@@ -6556,8 +6590,6 @@ function ble/term/modifyOtherKeys/.update {
   (1) ble/util/buffer $'\e[>4;1m\e[m' ;;
   (2) ble/util/buffer $'\e[>4;1m\e[>4;2m\e[m' ;;
   esac
-
-  _ble_term_modifyOtherKeys_current=$1
 }
 function ble/term/modifyOtherKeys/.supported {
   # libvte は SGR(>4) を直接画面に表示してしまう。
@@ -6600,6 +6632,9 @@ function ble/term/modifyOtherKeys/leave {
   fi
   ble/term/modifyOtherKeys/.update "$value"
 }
+function ble/term/modifyOtherKeys/reset {
+  ble/term/modifyOtherKeys/.update "$_ble_term_modifyOtherKeys_current"
+}
 
 #---- Alternate Screen Buffer mode --------------------------------------------