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 seaplanes, 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 pre-emptive torpedo strike before the shelling phase. After you get a submarine to level 10, they'll have that initial pre-emptive attack without any equipment at all. You can replace the equipment with regular torpedoes or turbines to increase their low evasion.

Highlight note:

• Green: Outstanding
• Yellow: Above average

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)	50	12	84	0	0	39	50(79)	18	19	49	Slow	2(1,1)	10	25
123	I-19 伊19改 Nicknamed Iku	Type B1 (SSV)	50	12	89	0	0	39	13(59)	18	19	49	Slow	2(1,1)	10	25
128	I-8 伊8改 Nicknamed Hachi	Type J3 (SSV)	50	14	84	0	0	39	25(69)	19	19	49	Slow	2(1,1)	10	25
155	I-401 伊401改 Nicknamed Shioi	Sen Toku (SSV)	35	19	80	0	0	45	20(59)	24	24	44	Slow	6(3,3)	25	30
163	Maruyu まるゆ改	Type 3 S.T.V.	20	5	19	0	0	4	7(77)	7	11	13	Slow	0	10	10