I have a Heroku Connect add-on that uses the
danketsu plan, and I'm not sure what that is.
danketsu is the former name of the Heroku Connect paid plan.
danketsu add-ons are still fully functional, but as of July 19, 2018, they can no longer be created. Instead, the new name of the Heroku Connect paid plan is
enterprise. If your team has purchased Heroku Connect, you'll be able to provision the
enterprise plan by selecting it in the Heroku Dashboard add-on UI or by using the
heroku addons:create herokuconnect:enterprise CLI command. You can read more about the available Heroku Connect plans in the Dev Center.