If you put it in your bag or backpack, it will be useful! Introducing the "portable aluminum foldable hanger " found at MUJI.
Portable aluminum foldable hanger
A foldable hanger that can be carried and stored compactly. By rotating the overlapping sticks around, it transforms into a hanger shape. This is useful when you want to wear a jacket that you took off while you are on the move or at your place of stay.
It is made of thick and sturdy aluminum alloy, and its width when used is about 38 cm, which is large enough. The load capacity is 2 kg, but it is said that it should not be used for long-term clothing storage. It seems that it should be considered as a hanger for temporary storage.
The price (tax included) of the "portable aluminum foldable hanger" is 590 yen. If you are looking for a hanger that is convenient to carry, why not check it out at the store. From MUJI, a "portable laundry set" that includes a mini-sized square hanger and a washing board is also available.