I-401

Info

伊401 (い401)		I-401
155
Sentoku Type (I-400 Class Submarine) Aircraft Carrying Submarine

HP	20→24	FP	2→9
ARM	5→24	TORP	36→72
EVA	13→35	AA	0
PLA	3	ASW	0
SPD	Slow	LOS	15→45
RGE	Short	LUK	20→59

Aircraft	Equipment
3	-Unequipped-
	-Locked-
	-Locked-
	-Locked-

Modernization	0 1 1 1
Build Time	3:20 (LSC)	Remodel Req
Consumption	20 15	Dismantle	1 2 3 2
Illustrator	Shibafu	Seiyuu	Ise Mariya

伊401改 (い401かい)		I-401 Kai
155
Sentoku Type (I-400 Class Submarine) Aircraft Carrying Submarine

HP	24→28	FP	6→19
ARM	7→24	TORP	40→80
EVA	12→44	AA	0
PLA	6	ASW	0
SPD	Slow	LOS	15→45
RGE	Short	LUK	20→59

Aircraft	Equipment
3	Prototype Seiran
3	-Unequipped-
	-Locked-
	-Locked-

Modernization	0 2 1 1
Remodel Level	35	Remodel Req	100 300
Consumption	25 30	Dismantle	1 2 4 3
Illustrator	Shibafu	Seiyuu	Ise Mariya

Gameplay Notes

Special Mechanics

Able to perform opening torpedo attacks when equipped with a Type A Ko-hyoteki.
- Able to perform opening torpedo attacks by default at level 10.
Able to carry seaplane fighters and bombers.

Overview

Good torpedo, HP and armour.

Analysis

Priority: Low

She doesn't have any use outside of a few limited niches like cheesing 2-1 for quests, subtanking the 3-5 north route or 6-1 routing. Outside of those limited uses, her good defensive stats and large slots for a submarine make her a good candidate when you require a submarine that can provide air support.

Recommended Roles

Air Support

Not Recommended Roles

Combat

Voice Lines

Quotes

Event	Japanese/English
Introduction Play	Good day, Admiral. I'm the 2nd ship of the Sentoku-class, I-401. You can call me 'Shioi'.^[1]
Introduction Play	提督、ごきげんよう。潜特型二番艦伊401です。しおいって呼んでね。
Introduction Play	Good day, Admiral. I'm the upgraded I-401, 2nd ship of the I-400-class.
Introduction Play	提督、ごきげんよう。潜特型二番艦伊401、改良型です。
Library Play	I'm the 2nd ship of the I-400-class submarines, I-401. I'm an aviation submarine that is capable of circumnavigating the globe more than once and can carry 3 special attack planes called "Seiran".^[2] That's right, I'm a secret strategic weapon... A secret ok!
Library Play	伊400型潜水艦二番艦、伊401です。地球をぐるっと一周以上余裕で航行できる長大な航続力と、特殊攻撃機「晴嵐」を3機搭載する潜水空母なんです。そう、戦略的秘密兵器…秘密なんだからっ！
Secretary 1 Play	What is it?
Secretary 1 Play	なんですか？
Secretary 2 Play	Can I dive? Can I dive now?
Secretary 2 Play	潜ります？　潜っちゃいます？
Secretary 2 Play	Can I dive? Can I dive now?
Secretary 2 Play	潜ります？潜らせちゃいます？
Secretary 3 Play	Please don't touch my hangar so much.^[3]
Secretary 3 Play	飛行機格納筒はあんまり触っちゃダメですよ。
Secretary 3 Play	I. Told. You. The Seiran is delicate so don't touch it so much.^[4]
Secretary 3 Play	だーかーらー　晴嵐はデリケートなんだから、あんまり触んないでって。
Secretary Idle Play	Ummm, can we umm, can we go to the canal?^[5]
Secretary Idle Play	えーっとー、運河とか、ね、運河とか行ってみたいねー、ね？
Secretary (Married) Play	Hmm? What's wrong? Are you tired? Don't push yourself too hard, Admiral.
Secretary (Married) Play	ん？どうしたの？疲れた？提督、無理しないでね。
Wedding Play	Did I... do really well, Admiral? Really? You're not lying? Yup, that's good then. Then, can I ask something of you Admiral? Yup, just one thing... alright?
Wedding Play	提督…私、活躍できた？ほんと？嘘じゃなくって？ぅん、良かったぁ～。なら、提督に、一つだけお願いしていい？うん、一つだけ…ね？
Player's Score Play	Ummm, here's information on you and the fleet.
Player's Score Play	えーっと、提督と艦隊の情報ですね
Player's Score Play	Hmmm~? Are you doing well, Admiral? Well?
Player's Score Play	ん～？提督、調子良い？どう？
Joining the Fleet Play	I-401, sortieing!
Joining the Fleet Play	伊401出撃します！
Joining the Fleet Play	Flagship, I-401, sortieing!
Joining the Fleet Play	旗艦、伊401出撃します！
Equipment 1 Play	Ah, this is nice, it's really nice!
Equipment 1 Play	あっ、いいね、いいと思います！
Equipment 1 Play	Ahh~, it's finally here, I got it!
Equipment 1 Play	あぁ～、そうきたかぁ～、有りです！
Equipment 2 Play	Alright! I think this is a great upgrade!
Equipment 2 Play	やったー！その強化、いいと思います！
Equipment 2 Play	Yup, yuo! This is nice! It's really nice!
Equipment 2 Play	うんうん！いいね！いいと思います！
Equipment 3^[6] Play	I'm diving!
Equipment 3^[6] Play	潜っちゃうよ！
Supply Play	Ah! Thanks! It's very important!
Supply Play	あー！ありがと！大切大切！
Docking (Minor Damage) Play	I'm going to jump in the bath!
Docking (Minor Damage) Play	お風呂にどぼーん！してきます！
Docking (Minor Damage) Play	I'm going straight to the baths! Whee!^[7]
Docking (Minor Damage) Play	お風呂直行！どぼーん！
Docking (Major Damage) Play	Long baths are also nice too, yup!
Docking (Major Damage) Play	長いお風呂もいいですよねぇ、うん！
Docking (Major Damage) Play	Baths sure are nice~! Yup yup!
Docking (Major Damage) Play	お風呂はいいですよね～！うんうん！
Construction Play	Looks like a new girl has arrived. What's she like?
Construction Play	新しい娘が来たみたい、どんなだろう？
Construction Play	It's a new girl. Is it a younger sister?
Construction Play	新しい子なんだって。妹かな～？
Returning from Sortie Play	Operation complete. The fleet has returned to port!
Returning from Sortie Play	作戦完了。艦隊、帰投しました！
Returning from Sortie Play	The operation is finished~! The fleet has returned!
Returning from Sortie Play	作戦おーしまいっ！艦隊、戻りました！
Starting a Sortie Play	It's time for the I-400-class aviation submarines to take the stage!
Starting a Sortie Play	潜水空母伊400型出番です！
Starting a Sortie Play	I-400-class aviation submarine, now crash diving.
Starting a Sortie Play	潜水空母伊400型、さぁ急速潜行です。
Starting a Battle Play	Now... it's time for the I-400-class' fight to begin!
Starting a Battle Play	さぁー…伊400型の戦い、始めるよ！
Starting a Battle Play	Alright~! The I-400-class' magnificient battle is beginning!
Starting a Battle Play	よぉ～し！伊401の華麗な戦い、始めちゃうよ！
Attack Play	Goooo~!
Attack Play	いっけぇーっ！
Attack Play	I'll get you!
Attack Play	やっちゃうからね！
Air Battle/Night Battle Attack Play	The Seirans and oxygen torpedoes are so cool right!
Air Battle/Night Battle Attack Play	晴嵐と、酸素魚雷。イケてるでしょ！
Air Battle/Night Battle Attack Play	The Seiran-sans are my friends after all.
Air Battle/Night Battle Attack Play	晴嵐さんたちは友達だもーん。
Night Battle Play	Now, I'll stand firm at night too. I'll get you all!
Night Battle Play	さぁ、夜もひと踏ん張り、やっちゃうからね！
Night Battle Play	Fufun~♪ The I-400-class is relentless on the pursuit!
Night Battle Play	ふふーん♪　伊400型の追撃はしつこいんだから！
MVP Play	Ah, I had the most conspicuous service? Alright♪ The I-400-class are good too right.^[8]
MVP Play	あっ、私が活躍しちゃった？　やったね♪　矢っ張り伊400型はイケるじゃない。
Minor Damage 1 Play	Aaah~! No no!
Minor Damage 1 Play	あぁーっ！やだやだ！
Minor Damage 2 Play	No no no! It hurts!
Minor Damage 2 Play	やだやだやだ！　痛いじゃない！
Major Damage Play	Nggh, they got me... But I can still go on! Don't underestimate me!
Major Damage Play	んぐふっ、やられた…。でも、まだまだやれるよ！なめないで！
Sunk Play	Uggh...I wonder if I struggled enough this time...A sinking ship really sinks huh... Bye bye...^[9]
Sunk Play	うっうぅ…今回は随分暴れられたかな…沈む船が本当に沈むのね…バイバイ…

↑ She says 'Sentoku-gata' (潜特型) which translates to Submarine Special-type, that refers exclusively to the I-400 line of submarines.
↑ The I-400 submarines were designed to carry enough fuel to circumnavigate the globe 1.5 times.
↑ She literally says 'aircraft storage tube' because her hangar was cylindrical in design.
↑ The Seiran was designed to be foldable in order to fit in the cramped submarine hangar.
↑ I-400, 401, 13 and 14 were to take part in an operation to bomb the locks on the Pacific-side of the Panama Canal. The operation was cancelled on June 20 1945 while the crews were still training for it.
↑ This line is shared with expedition selection, resource collection, instant repair and development.
↑ She says 'splash' which means she's jumping into the baths.
↑ The I-400s never saw any real action during WWII.
↑ She's making a pun on the word '沈む' which can both mean 'to sink' or 'to submerge' and a submarine is literally a 'ship that goes under water'.

Hourlies

Time	Japanese/English
00:00 Play	0000. Thanks for your hard work, Admiral.
00:00 Play	マルマルマルマル。提督、お疲れ様ですよー。
01:00 Play	0100. I'm a bit sleepy. Ah, I'm still awake.
01:00 Play	マルヒトマルマル。しおい、ちょっとねむいなー。あ、まだ起きてるよ
02:00 Play	0200. Aren't you going to sleep soon, Admiral? Really? You sure work hard.
02:00 Play	マルフタマルマル。提督、そろそろ寝ないの？　ほんとー？　がんばるなー。
03:00 Play	0300. Admiral, I'm going to lie down for a bit alright? Zzz...
03:00 Play	マルサンマルマル。提督、しおい、少しだけ横になる、ね？　むにゃ…
04:00 Play	0400. Ngggh... It's almost morning huh. Can't be helped, I'll work hard!
04:00 Play	マルヨンマルマル。ん、んー、そろそろ朝かー。しょうがない、頑張るか！
05:00 Play	0500. It's morning. Alright! I'll do my best!
05:00 Play	マルゴーマルマル。朝ですね。よーし！　頑張るぞー、おー！
06:00 Play	0600. It's already morning Admiral! Want to go for a morning dive?
06:00 Play	マルロクマルマル。提督、朝ですよ、朝！　朝の一潜り、しちゃう？
07:00 Play	0700. Let's eat breakfast! What should I have? Mozuku?^[1]
07:00 Play	マルナナマルマル。朝ごはん食ーべよっ！　しおい、何がいいかなぁ？もずくとか？
08:00 Play	0800. Was breakfast delicious, Admiral? Good to hear!
08:00 Play	マルハチマルマル。提督、朝ごはんおいしかった？　よかった！
09:00 Play	0900. Now, is it almost time to do a real sortie?! Well?!
09:00 Play	マルキューマルマル。さぁ、そろそろ本格的に出撃しちゃう？！ねぇ？！
10:00 Play	1000. That's right. I don't quite like ASW equipped destroyers and light cruisers.
10:00 Play	ヒトマルマルマル。そうねぇ。対潜装備の駆逐艦とか軽巡とかは、ちょっと嫌ね
11:00 Play	1100. It's almost lunchtime, Admiral. What do you want for lunch?
11:00 Play	ヒトヒトマルマル。提督、そろそろお昼よね。何にする、お昼、ねぇ。
12:00 Play	1200. Alright! It's lunchtime! Can I have some shore leave?
12:00 Play	ヒトフタマルマル。やったー！お昼だー！　半舷上陸していい、かな？
13:00 Play	1300. Lunch was delicious right, Admiral? It definitely must be curry for lunch right?
13:00 Play	ヒトサンマルマル。お昼おいしかったねぇ、提督。やっぱお昼はカレーだよね。
14:00 Play	1400. Let's go for a short dive with a fleet of only submarines.
14:00 Play	ヒトヨンマルマル。潜水艦だけで艦隊組んで、ちょっと潜ってこようよ。
15:00 Play	1500. The score will be updated soon, Admiral. Do you want to go check it?
15:00 Play	ヒトゴーマルマル。提督、戦績が更新されますね。確認します？
16:00 Play	1600. Hmmm... as expected, I'm feeling a bit tired. Do you want to rest a while Admiral?
16:00 Play	ヒトロクマルマル。んー、流石にちょっと疲れたかなぁ。提督、少し休む？
17:00 Play	1700. It's almost night. whew, so tired. What do you want for dinner?
17:00 Play	ヒトナナマルマル。もうすぐ夜だねぇ。はー、疲れたぁ、晩御飯なんだろう、ねぇ？
18:00 Play	1800. Admiral, it's getting dark you know? Isn't it almost time to end your day?
18:00 Play	ヒトハチマルマル。提督、日が暮れちゃったよ？　そろそろ今日はおしまい？
19:00 Play	1900. Admiral, the night view here is great too right? I kind of like it.
19:00 Play	ヒトキューマルマル。提督ー、ここからの夜景もいいよね。割と好き。
20:00 Play	2000. Now, time for dinner. What should we have today, I can't wait!
20:00 Play	フタマルマルマル。さっ、晩御飯食べよう。今日は何かなぁ、ワクワクするね！
21:00 Play	2100. Wow, today was tiring. I'm going to sleep after doing maintenance on the Seirans.
21:00 Play	フタヒトマルマル。はー、今日も疲れたねぇ。晴嵐整備して、そろそろ寝ちゃおうかな。
22:00 Play	2200. It's totally night now. I've already put away my Seirans, are we not getting some rest?
22:00 Play	フタフタマルマル。とっぷり夜だよぉ。晴嵐も片付けたし、もう休まない？
23:00 Play	2300. Are you sleeping soon, Admiral? Getting sleep is important you know?
23:00 Play	フタサンマルマル。提督、そろそろ寝ようよ？　睡眠時間も大切だよ？

↑ Mozuku is a type of edible seaweed.

Seasonal

Ship	Japanese/English	Notes
New Year 2016 Play	Think hard about an operation that I can take part in, Admiral. I’m serious you know? Please! …Alright?
New Year 2016 Play	提督～、わたしの活躍できる作戦、ちゃんと考えてよね。ほんとだよ？お願いなんだからね！…ねぇ？

CG

Regular
Base Base Damaged

Seasonal
New Year 2016 New Year 2016 Damaged Summer 2017 Summer 2017 Damaged

Drop Locations

Ship	Rarity	Type	No.	World 1						World 2					World 3					World 7					World 4					World 5					World 6					Remarks
Ship	Rarity	Type	No.	1	2	3	4	5	6	1	2	3	4	5	1	2	3	4	5	1	2	3	4	5	1	2	3	4	5	1	2	3	4	5	1	2	3	4	5	Remarks
I-401	Holo	SSV	155																																✔️					LSC only

Trivia

Her nickname, "Shioi", is an alternate reading of "401". 4 = "Shi"; 0 = "O"; 1 = "I".
Christmas 2013 Event special map E3 completion reward.
Can be constructed in LSC from the update on 26 September 2014.
Her design was shown in the endcard of Arpeggio anime episode 1 that aired 8 October 2013, two months before she was added to the game.
Commissioned 8 January 1945.
Expended as a target ship, off Pearl Harbor, 31 May 1946. Wreck found in March, 2005.
The reason she was a target ship by the US Navy was to prevent her from falling into the hands of the Soviet Union before the Cold War.