How to import taxonomy from Json format
Here are some resources if you opt to use Migrate Framework in 7.x to do this (which is how I would personally approach it).


https://www.drupal.org/project/migrate
https://www.drupal.org/project/migrate_source_json
https://www.drupal.org/project/migrate_plus


There are examples in Migrate/Migrate Plus on getting it setup. It looks like migrate_source_json was deprecated in favor of migrate_plus, but I included it for any historical references in it's issue queue.

There is probably a solution via Feeds as well but as stated, I am not experienced with Feeds.

If you can convert your format to CSV, there is also this one off module, Taxonomy CSV.