Thank you for mentioning us @Jizo_Inagaki and sorry about replying in English here.
You sure can bulk remove Tags from your Orders with the Matrixify app!
The best way to do so would be to export Orders with the Matrixify app and select to export Basic Columns in the app for Orders. But you can also use the Shopify orders export as you just need to have order names and know tags that need to be removed.
From the exported file you need to construct a file with just 4 columns:
Name = Orders name, e.g., #1234.
Command = value UPDATE to tell the app that you are updating Orders.
Tags = a comma-separated list of only tags that you need to be removed from each order.
Tags Command = value DELETE. This will tell the app that tags listed in the Tags column need to be removed from the Order.
So your import file could look something like this:
Then you can save and import this file with the app. Just make sure that the sheet/tab name contains the word orders so that the app detects the import correctly as Orders import.