The Type 37 Star Army Field Jacket is a fire-resistant uniform top that was originally intended to be the primary component of the Star Army of Yamatai's Type 37 Utility Uniform but was replaced by the Star Army Field Jacket, Type 37A. It was introduced in early YE 37 and is manufactured by Ketsurui Zaibatsu and is used as a general purpose jacket. Replacements cost 75 KS.

The jacket features constructed from quick-drying, moisture-wicking, and fire-resistant breathable synthetic polymer fabric. It is designed to be worn over a basic cotton T-Shirt or a bodysuit.

It has a band collar suitable for wear with body armor. The chest has rugged, hidden zipper and a hidden pocket on the left chest that is commonly used to carry pens and can be used for a name tape. There are shoulder straps with snaps.

The arms have integrated elbow padding and pockets with hook-and-pile closures and elasticized wrists that keep out flames and allow for easy fitting with gloves.

Type 37 Utility Uniform was intended to replace the Star Army Working Uniform, Type 31 and possibly the Star Army Coverall, Type 36 for planetary personnel and act as a general-purpose uniform for training, field use, and unarmored combat. Originally it was planned to be a “Jacket, Type 35C” which was a field-colored version of the jacket from the Star Army Duty Uniform, Type 35, but the design changed significantly due to feedback. The cut was altered to be more like the Type 31 Working Uniform and the front flap was removed. Various designs including ones with chest buttons and hook-and-pile were proposed and discarded until the final design was settled. After several design iterations, test programs, and feedback from soldiers, production and distribution started in early YE 37.

By YE 38, the more advanced Star Army Field Jacket, Type 37A had replaced the Type 37 jacket for planetary field uniforms and the Type 37 jacket started being used with the Star Army Female Bodysuit, Type 22 instead.

The jacket is available in several colors, designed for the environments in which Star Army soldiers will operate. Standard variants include olive green #373D2C (standard), khaki, black, and gray.

There was originally going to be a color-changing version of the jacket. It became the Star Army Field Jacket, Type 37A.

For officers, the rank is on the lower sleeves and for enlisted, rank is on the left sleeve. Note that officers and warrant officers have a legion patch in the location where enlisted and NCOs have their rank patch. NCOs and enlisted soldiers do not wear a legion patch.

Enlisted rank is on the upper left arm only, midway between the shoulder and the elbow.

Jôtô Hei	3 green bars			Jôtô Heisho	three red inverted chevrons
Ittô Hei	2 green bars			Ittô Heisho	two red inverted chevrons
Nitô Hei	1 green bar			Nitô Heisho	a red inverted chevron
There are no rank patches for the ranks of Yontô Hei and Santô Hei.

Officer and warrant officer rank goes around the ends of both sleeves. For officer ranks, the gold rank insignia on the lower sleeves always has the thinner strips higher on the arm.

Taii	2 stripes			Taisa	4 stripes			Taisho	2 thick stripes
Chui	1 stripe and one thin stripe			Chusa	3 stripes			Chujo	1 thick stripe and one normal stripe
Shoi	1 stripe			Shosa	2 stripes and one thin stripe			Shôshô	1 thick stripe
Shoi Kohosei	1 thin stripe			Warrant officers have one to three blue stripes.