karabinier : ~/.config/karabiner/assets/complex_modifications/FromEscapeToJapanese_eisuu.json

FromEscapeToJapanese_eisuu.json

{
  "title": "Terminal等でESCあるいは^[で日本語入力を英数に",
  "rules": [
    {
      "description": "Terminal, iTerm2またはMacVimでESCあるいは^[を押したときに日本語入力を英数に切り替える。",
      "manipulators": [
        {
          "type": "basic",
          "from": { "key_code": "escape", "modifiers": { "optional": [ "any" ] } },
          "to": [ { "key_code": "japanese_eisuu" }, { "key_code": "escape" } ],
          "conditions": [ { "type": "frontmost_application_if", "bundle_identifiers": [ "^com\\.googlecode\\.iterm2", "^com\\.apple\\.Terminal$", "^org\\.vim\\." ] } ]
        },
        {
          "type": "basic",
          "from": { "key_code": "open_bracket", "modifiers": { "mandatory": ["left_control"] } },
          "to": [ { "key_code": "japanese_eisuu" }, { "key_code": "escape" } ],
          "conditions": [ { "type": "frontmost_application_if", "bundle_identifiers": [ "^com\\.googlecode\\.iterm2", "^com\\.apple\\.Terminal$", "^org\\.vim\\." ] } ]
        }
      ]
    }
  ]
}