JK Japan Keyboard Helper
It offers you can input Japan words without the physical keyboard. http://project.kimx.info/2016/11/jk-keyboard.html
Additional files are visible only to premium users
manifest.json
{
"update_url": "https://clients2.google.com/service/update2/crx",
"default_locale": "en",
"manifest_version": 3,
"name": "__MSG_extName__",
"description": "__MSG_extDesc__",
"version": "3.3",
"permissions": [
"storage"
],
"action": {
"default_popup": "popup.html",
"default_icon": {
"16": "img/icon-128.png",
"48": "img/icon-128.png",
"128": "img/icon-128.png"
}
}
}