<C-[>でIMEオフにもするkarabiner.jsonのrule

rule.json

{
    "description": "Change `<C-[>` to `<C-[> + IME off` in some apps.",
    "manipulators": [
        {
            "from": {
                "key_code": "open_bracket",
                "modifiers": {
                    "mandatory": [
                        "control"
                    ],
                    "optional": [
                        "any"
                    ]
                }
            },
            "to": [
                {
                    "key_code": "open_bracket",
                    "modifiers": [
                        "control"
                    ]
                },
                {
                    "key_code": "japanese_eisuu"
                }
            ],
            "conditions": [
                {
                    "type": "frontmost_application_if",
                    "bundle_identifiers": [
                        "com.googlecode.iterm2",
                        "org.vim.MacVim",
                        "com.happenapps.Quiver",
                        "com.github.atom",
                        "com.jetbrains.rubymine",
                        "com.jetbrains.rubymine-EAP",
                        "com.jetbrains.AppCode",
                        "com.google.android.studio"
                    ]
                }
            ],
            "type": "basic"
        }
    ]
}