Full outfit: https://ffxiv.eorzeacollection.com/gearset/yakaku-koshita
In FFXIV, the top is called a “Yakaku Dogi”. I think Yakaku is a name. I think the Dogi name is the garment. It looks like a 道着 (どうぎ, dougi) with one sleeve off.
Trousers: https://gearsets.eorzeacollection.com/quest/ew/yakaku-koshita/hyur-male-legs.png
The trousers are called ‘Yakaku Koshita”. I think Koshita is actually 腰板 (Koshi-ita), which refers to a trapezoidal stiff back-panel of a Hakama. But this doesn’t quite look like a Hakama, because it’s not pleated and neither andon (lantern) nor umanori (pant) have a divide in the front.
Any ideas on what the term for this is?
The term for the parts?
https://www.reddit.com/r/japan/comments/10d7wyn/what_type_of_garment_is_this/