Japanese Work Clothes Shirt Jacket Male Loose Cardigan Square Collar 100% Cotton Overshirt in Black Coffee Green Sizes M to 3XL
Japanese Work Clothes Shirt Jacket Male Loose Cotton Cardigan

This Japanese work clothes shirt jacket is a loose-type cardigan with a square collar, made from 100% cotton. It is designed as a men's overshirt that layers easily over a t-shirt or light top. The square collar creates a flat, defined neckline that works whether you wear it open or closed. With sizes from M to 3XL and three colour options in black, coffee, and green, it covers a range of builds and casual outfits. The cardigan style means there is no heavy padding or rigid structure, so it behaves like a soft shirt jacket rather than a coat. This makes it suited to everyday wear, light work, or relaxed weekends when you want an extra layer without bulk. The loose version gives extra room through the body, which helps with movement and makes it easier to wear over other garments.
Features and Construction

The construction details are simple and clearly stated. This is a loose-type cardigan with a square collar and a 100% cotton main fabric. There are no hidden linings, fillings, or mixed fabrics listed in the source information, so the garment should be understood as a single-layer cotton shirt jacket. That matters when you are deciding how to wear it and what to expect from it.
Material and Build
The main fabric is 100% cotton, with the cotton content listed as the full main fabric composition. Cotton is a natural fibre that is widely used for casual shirts and light jackets because it is breathable and soft against the skin. In this shirt jacket, the cotton fabric supports the loose cardigan shape and the square collar without adding stiffness. There is no elastic, lining, or synthetic blend stated, so the feel is likely to be that of a straightforward woven cotton garment. The cardigan version means the front is designed to be worn open or closed, depending on your preference.
Size and Practical Fit
This shirt jacket comes in sizes M, L, XL, 2XL, and 3XL. The bust measurements run from 54cm in M to 66cm in 3XL. Shoulder width goes from 58cm in M to 68cm in 3XL. Length ranges from 66cm in M to 76cm in 3XL, and sleeve length runs from 52cm in M to 56cm in 3XL. Because the version is loose, the cut already provides extra room through the chest and body. The size information is given in centimetres, and manual measurement differences of 2-3cm should be allowed. Asian sizes are stated as 1 to 2 sizes smaller than European and American sizes, so checking the chart is important before ordering.
Uses and Placement

This is a men's shirt jacket that fits into casual and light work settings. The loose cardigan shape and square collar give it a relaxed look that works for everyday errands, outdoor tasks, or as a mid-layer. It is not described as waterproof, insulated, or protective against heavy weather, so it should be treated as a breathable cotton overshirt rather than outerwear for extreme conditions.
Event or Professional Use
For informal work environments or practical tasks, the loose cut allows movement through the arms and shoulders. The square collar keeps the neckline neat, and the 100% cotton fabric keeps the garment lightweight enough to wear for longer periods. In black, coffee, or green, it can be paired with work trousers or jeans without drawing attention. It is a straightforward layering piece for jobs that do not require high-visibility or protective clothing.
Everyday Home Use
At home, this shirt jacket works as an easy extra layer over a t-shirt or long-sleeve top. The cardigan style makes it simple to put on and take off, and the loose version means it does not cling to the body. The cotton main fabric is suitable for relaxed indoor wear, and the square collar gives it a slightly different look from a standard crew-neck shirt. It can also be worn open as a light cover-up during milder weather.
Benefits and Buying Value

The main value of this shirt jacket comes from its simple construction, stated cotton content, and broad size range. It is a single garment that can be layered in different ways, and the loose cut reduces the need for an exact body-hugging fit. Because the material and measurements are clearly given, buyers can compare the chart against their own measurements before ordering.
Reuse and Low Maintenance
As a 100% cotton garment, this shirt jacket fits into a normal casual laundry routine. Cotton items are generally washed with similar colours and according to the care label if one is supplied. The simple cardigan construction has no complicated fastenings or removable parts described, so there is little to maintain beyond standard washing. The loose shape and square collar also mean there are no structured elements that need special reshaping after cleaning.
Why Choose This Product
Choose this shirt jacket if you want a loose-fitting cotton overshirt with a square collar and a cardigan front. It comes in five sizes from M to 3XL and three colours, which gives useful choice without overcomplicating the range. The 100% cotton main fabric is stated clearly, and the measurements are provided in centimetres for each size. The main limitation is the sizing: Asian sizes run 1 to 2 sizes smaller than European and American sizes, so buyers should check the chart carefully and size up if they fall between two sizes.

