It seems a dedicated Taiwanese edition was not produced, so the Asian edition was released in Taiwan with an age rating sticker on the front and a sticker from the distributor on the back. Two variant stickers have been seen.
It came with a double-sided cover insert, with Japanese text on one side and English on the other. It included a manual and a Deluxe Weapons DLC sheet. The Special Theme 2 DLC sheet which came with the PS4 edition seems to have been excluded.
1. Front of Japanese cover with sticker
2. Back of Japanese cover with Justdan sticker variant 1
3. Back of Japanese cover with Justdan sticker variant 2
Thanks to Ruten members cuteyvonne1688 (images 1-2) and tvniny (image 3).