List of submarines by upgraded maximum stats

Advantages and disadvantages:

• Submarines can only be attacked by destroyers, light cruisers, torpedo cruisers, aviation battleships/cruisers with seaplane bombers, and light aircraft carriers. In addition, they are prioritized to attack submarines first, meaning your other ships can get away with no damage done to them for free.
• Submarines are also the most resource-efficient class in the game, they cost almost nothing to deploy/repair and, in addition, make excellent, cheap additions towards multiple expeditions that utilize them.
• If you have Type A Ko-hyoteki, you can put it on a submarine for a preemptive torpedo strike before the shelling phase. After you get a submarine to level 10, they'll have that initial preemptive attack without any equipment at all. You can replace the equipment with regular torpedoes, or turbines to increase their low evasion.

• You can equip SS(V) with SONAR equipment to boost their accuracy, and make them more dangerous in night combat. However, this bonus is sometimes too small compared to using torpedo equipment.
• With the 53cm Submarine Bow Torpedo Mount (8 tubes) and SONAR, you can increase the hit chance of a sub as well as allow them to use a cut in attack. This tactic is only viable for remodeled SSV with 2 equipment slots.

Highlight note:

• Green: Outstanding
• Yellow: Above average
• Since the Luck Stat is difficult to modernize, it is listed as Base(Max).

No.	Name	Class
126	I-168 伊168改 Nicknamed Imuya	Kaidai 6a	50	11	69	0	0	29	10(49)	15	18	49	Slow	0	10	20
127	I-58 伊58改 Nicknamed Goya	Type B3 (SSV)		12	84			39	50(79)	18	19			2(1,1)		25
123	I-19 伊19改 Nicknamed Iku	Type B1 (SSV)			89				13(59)
128	I-8 伊8改 Nicknamed Hachi	Type J3 (SSV)		14	84				25(69)	19
155	I-401 伊401改 Nicknamed Shioi	Sen Toku (SSV)	35	19	80			45	20(59)	24	24	44		6(3,3)	25	30
163	Maruyu まるゆ改	Type 3 S.T.V.	20	5	19			4	7(77)	7	11	13		0	10	10