This is the Goat Suede Relaxed Leather Jacket from beta post [ベータポスト].

This is a single-tailored jacket made from thick goat suede.
There is no front closure; instead, the left and right body panels are brought together with a loop-and-button closure, adding a light, skipper-shirt-like appearance.
It also features a multi-pocket that can store bottles, utilizing the lining of the waist pockets.

〈Size〉
3
Shoulder width: 58cm / Body width: 64(128)cm / Sleeve length: 55cm / Length: 73cm
*Model height cm wearing size 3 

〈Material〉
Outer fabric: leather (goatskin suede) 100%
Collar: leather (goatskin) 100%
Lining (pocket): cotton 100%

beta post[ベータポスト]
Designer: Satoshi Ezaki

beta post is a fashion brand for which Satoshi Ezaki serves as designer. 
beta post was created when "ED ROBERT JUDSONβ," an experimental line of the brand "ED ROBERT JUDSON" by Satoshi Ezaki, changed its name from Fall/Winter 2019. 
beta post proposes designs that "encourage the viewer's thought" through its products.
It creates products not only as fashion but also as a "medium" to raise questions. It offers conceptual and unique bags, accessories, and apparel.