The Fourth Fleet currently has two Carrier Battle Groups.
| Role | Class | Name | IRN | Commander | Status |
|---|---|---|---|---|---|
| Capital | Sharie-class Battleship | YSS Tsu | NB-4S-101 | Active (Flag) | |
| Capital | Sharie-class Battleship | YSS Sendai | NB-4S-102 | Active | |
| Capital | Sharie-class Battleship | YSS Niigata | NB-4S-103 | Active | |
| Carrier | Heitan-class Carrier | YSS Unryu | NC-4S-101 | Active | |
| Carrier | Heitan-class Carrier | YSS Unyo | NC-4S-102 | Active | |
| Escort | Super Eikan-class Heavy Cruiser | YSS Naha | NJ-4S-107 | Active | |
| Escort | Super Eikan-class Heavy Cruiser | YSS Wakayama | NJ-4S-108 | Active | |
| Escort | Super Eikan-class Heavy Cruiser | YSS Otsu | NJ-4S-109 | Active | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS Nara | NE-4S-119 | Active | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS Okayama | NE-4S-120 | Active | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS Edogawa | NE-4S-121 | Active | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS Adachi | NE-4S-106 | Active | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS Himeji | NE-4S-107 | Active | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS Matsudo | NE-4S-108 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS Kouhei | NJ-4S-201 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS Kousotsu | NJ-4S-202 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS Yuushi | NJ-4S-203 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS Mushae | NJ-4S-204 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS Kobushi | NJ-4S-205 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS Okoze | NJ-4S-206 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS Gikun | NJ-4S-207 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS Kokumau | NJ-4S-208 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS Kodate | NJ-4S-209 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS Toku | NJ-4S-210 | Active |
TF-O02 is the 4SF Response Force. They stand ready to respond to any attack upon a Bard Cluster planet.
| Role | Class | Name | IRN | Commander | Status |
|---|---|---|---|---|---|
| Capital | Sharie-class Battleship | YSS Machida | NB-4S-201 | Active | |
| Capital | Sharie-class Battleship | YSS Amagasaki | NB-4S-202 | Active | |
| Capital | Sharie-class Battleship | YSS Iwaki | NB-4S-203 | Active | |
| Carrier | Heitan-class Carrier | YSS Zuiho | NC-4S-201 | Active | |
| Carrier | Heitan-class Carrier | YSS Zuikaku | NC-4S-202 | Active | |
| Escort | Super Eikan-class Heavy Cruiser | YSS Kawagoe | NJ-4S-207 | Active | |
| Escort | Super Eikan-class Heavy Cruiser | YSS Kurume | NJ-4S-208 | Active | |
| Escort | Super Eikan-class Heavy Cruiser | YSS Akashi | NJ-4S-209 | Active | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS Tokushima | NE-4S-219 | Active | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS Fuji | NE-4S-220 | Active | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS Atsugi | NE-4S-221 | Active | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS Ageo | NE-4S-206 | Active | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS Chōfu | NE-4S-207 | Active | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS Itami | NE-4S-208 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-211 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-212 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-213 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-214 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-215 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-216 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-217 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-218 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-219 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-220 | Active |
| Role | Class | Name | IRN | Commander | Status |
|---|---|---|---|---|---|
| Capital | Sharie-class Battleship | YSS | NB-4S-201 | Pending Construction | |
| Capital | Sharie-class Battleship | YSS | NB-4S-202 | Pending Construction | |
| Capital | Sharie-class Battleship | YSS | NB-4S-203 | Pending Construction | |
| Carrier | Heitan-class Carrier | YSS | NA-4S-201 | Pending Construction | |
| Carrier | Heitan-class Carrier | YSS | NA-4S-202 | Pending Construction | |
| Escort | Super Eikan-class Heavy Cruiser | YSS | NJ-4S-207 | Pending Construction | |
| Escort | Super Eikan-class Heavy Cruiser | YSS | NJ-4S-208 | Pending Construction | |
| Escort | Super Eikan-class Heavy Cruiser | YSS | NJ-4S-209 | Pending Construction | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS | NE-4S-219 | Pending Construction | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS | NE-4S-220 | Pending Construction | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS | NE-4S-221 | Pending Construction | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS | NE-4S-206 | Pending Construction | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS | NE-4S-207 | Pending Construction | |
| Escort | Chiaki-class (1B) Escort Destroyer | YSS | NE-4S-208 | Pending Construction | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-221 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-222 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-223 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-224 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-225 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-226 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-227 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-228 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-229 | Active | |
| Escort | Urufu-Class Light Cruiser | YSS - | NJ-4S-230 | Active |
