right_shift to _ (under bar) in Karabiner-Elements

rightshift.json

{
    "description": "右シフトをアンダーバーにする",
    "manipulators": [
        {
            "from": {
                "key_code": "right_shift",
                "modifiers": {
                    "optional": [
                        "any"
                    ]
                }
            },
            "to": [
                {
                    "key_code": "right_shift"
                }
            ],
            "to_if_alone": [
                {
                    "key_code": "hyphen",
                    "modifiers": [
                        "right_shift"
                    ]
                }
            ],
            "type": "basic"
        }
    ]
}

~/.config/karabiner/karabiner.json