I-401

Info

155 伊401 (い401) I-401 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

155 伊401改 (い401かい) I-401 Kai 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.

Fit Bonuses

[edit]I-401 Equipment Bonuses
Equipment	Extra Requirement									Note
Late Model 53cm Bow Torpedo Mount (8 tubes)			+2
	(1st equipped) (★4-5)		+1							One-time
	(1st equipped) (★6-7)		+1					+1		One-time
	(1st equipped) (★8-9)		+2					+1		One-time
	(1st equipped) (★MAX)		+2					+2		One-time
Late Model Bow Torpedo Mount (4 tubes) OR Skilled Sonar Personnel + Late Model Bow Torpedo Mount (4 tubes)	(1st equipped)		+1						+4	One-time
Skilled Sonar Personnel + Late Model Bow Torpedo Mount (4 tubes)	(★4-5)		+1
	(★6-7)		+2
	(★8-9)		+3
	(★MAX)		+3					+1
Late Model Submarine Radar & Passive Radiolocator									+3
	+ Late Model Bow Torpedo Mount (6 tubes) OR Skilled Sonar Personnel + Late Model Bow Torpedo Mount (6 tubes) OR Late Model 53cm Bow Torpedo Mount (8 tubes)		+3						+2	One-time
Late Model Radar & Passive Radiolocator + Snorkel Equipment	(★3)								+1
	(★4)							+1	+1
	(★5)		+1					+1	+1
	(★6-7)		+1					+1	+2
	(★8-9)		+2					+1	+2
	(★MAX)		+2					+2	+2
	(1st equipped)		+3						+3	One-time
	(★2-MAX) + ★4+ Skilled Sonar Personnel + Late Model Bow Torpedo Mount (4 tubes)		+7					+5		One-time
Ship-Type Bonuses
Type 0 Small Reconnaissance Seaplane OR Type 0 Small Reconnaissance Seaplane (Skilled)	(★0)		+1			+3		+1	+5
	(★1)		+2			+3		+1	+5
	(★2)		+2			+3		+2	+5
	(★3-4)		+2			+3		+2	+6
	(★5-7)		+2			+4		+2	+6
	(★8-9)		+2			+4		+3	+6
	(★MAX)		+2			+4		+3	+7
Type 0 Small Reconnaissance Seaplane (Skilled)			+2			+1		+1	+1	+2
Type D Kouhyouteki Kai (Kouryuu Kai)		-1							-7
Kyoufuu Kai 2	(★3-4)	+1
	(★5-6)	+1		+1
	(★7-9)	+1		+1					+1
	(★MAX)	+1		+1				+1	+1
Special Type 4 Amphibious Tank OR Special Type 4 Amphibious Tank Kai	(★0)	+1	+2						-1
	(★1-2)	+1	+3						-1
	(★3-5)	+1	+3					+1	-1
	(★6-9)	+1	+3					+2	-1
	(★MAX)	+1	+4					+2	-1
Special Type 4 Amphibious Tank Kai	(★0-1)	+1	+1					+1
	(★2-3)	+2	+1					+1
	(★4-7)	+2	+2					+1
	(★8-MAX)	+3	+2					+1

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'.
	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.
	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". That's right, I'm a secret strategic weapon... A secret ok!
	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?
	なんですか？
Secretary 2 Play	Can I dive? Can I dive now?
	潜ります？　潜っちゃいます？
Secretary 2 Play	Can I dive? Can I dive now?
	潜ります？潜らせちゃいます？
Secretary 3 Play	Please don't touch my hangar so much.
	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.
	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?
	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.
	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?
	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.
	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?
	ん～？提督、調子良い？どう？
Joining the Fleet Play	I-401, sortieing!
	伊401出撃します！
Joining the Fleet Play	Flagship, I-401, sortieing!
	旗艦、伊401出撃します！
Equipment 1 Play	Ah, this is nice, it's really nice!
	あっ、いいね、いいと思います！
Equipment 1 Play	Ahh~, it's finally here, I got it!
	あぁ～、そうきたかぁ～、有りです！
Equipment 2 Play	Alright! I think this is a great upgrade!
	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!
	うんうん！いいね！いいと思います！
Equipment 3 Play	I'm diving!
	潜っちゃうよ！
Supply Play	Ah! Thanks! It's very important!
	あー！ありがと！大切大切！
Docking (Minor Damage) Play	I'm going to jump in the bath!
	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!
	お風呂直行！どぼーん！
Docking (Major Damage) Play	Long baths are also nice too, yup!
	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!
	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?
	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?
	新しい子なんだって。妹かな～？
Returning from Sortie Play	Operation complete. The fleet has returned to port!
	作戦完了。艦隊、帰投しました！
Returning from Sortie Play	The operation is finished~! The fleet has returned!
	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!
	潜水空母伊400型出番です！
Starting a Sortie Play	I-400-class aviation submarine, now crash diving.
	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!
	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!
	よぉ～し！伊401の華麗な戦い、始めちゃうよ！
Attack Play	Goooo~!
	いっけぇーっ！
Attack Play	I'll get you!
	やっちゃうからね！
Air Battle/Night Battle Attack Play	The Seirans and oxygen torpedoes are so cool right!
	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.
	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!
	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!
	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.
	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!
	あぁーっ！やだやだ！
Minor Damage 2 Play	No no no! It hurts!
	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!
	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...
	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…

Hourlies

Time	Japanese/English
00:00 Play	0000. Thanks for your hard work, Admiral.
	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.
	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.
	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...
	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!
	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!
	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?
	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?
	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!
	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?!
	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.
	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?
	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?
	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?
	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.
	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?
	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?
	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?
	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?
	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.
	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!
	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.
	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?
	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?
	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？

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?
	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

Drop Locations

Ship	Rarity	Type	No.	World 1						World 2					World 3					World 7					World 4					World 5					World 6					Remarks
				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
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.

See Also

• View I-401 CG
• List of Submarines
• Wikipedia entry on submarine I-401