I-400

Info

伊400 (い400)		I-400
293
Sentoku Type (I-400 Class Submarine) Aircraft Carrying Submarine

HP	20→24	FP	2→10
ARM	5→24	TORP	36→73
EVA	13→34	AA	0
PLA	3	ASW	0
SPD	Slow	LOS	15→46
RGE	Short	LUK	19→58

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

Modernization	0 1 1 1
Build Time	3:20 (Unbuildable)	Remodel Req
Consumption	20 15	Dismantle	1 2 3 2
Illustrator	Shibafu	Seiyuu	Imamura Ayaka

伊400改 (い400)		I-400 Kai
293
Sentoku Type (I-400 Class Submarine) Aircraft Carrying Submarine

HP	24→28	FP	6→20
ARM	7→24	TORP	40→82
EVA	12→43	AA	0
PLA	6	ASW	0
SPD	Slow	LOS	16→46
RGE	Short	LUK	19→58

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

Modernization	0 2 1 1
Remodel Level	37	Remodel Req	100 300
Consumption	25 30	Dismantle	1 2 4 3
Illustrator	Shibafu	Seiyuu	Imamura Ayaka

Gameplay Notes

Submarines (SS) have high torpedo stats, and are limited to the Opening Torpedo Salvo, the Closing Torpedo Salvo, and Night Battle. They:

Are only vulnerable to ASW only.
Utilize Sub Submarine Torpedoes and Submarine Equipment.
Can inately trigger Opening Torpedo Salvos after reaching level 10.
Have access to special Night Cut-Ins.

Submarine Aircraft Carriers (SSV), are SS that can equip Recon/ Bomber/ seaplanes.

Special Mechanics

None

Equipability Exceptions

SSV	Default equipment compatibility
	✔️ Can Equip	❌ Cannot Equip
	Recon Bomber	Sp
	Sub Minisub Small	Sp Sp_Sec Large Small Large Sp
		Medium Large Large
	RE:
	Equipability notes: = ; = ; = ; = Recon ; = Bomber ; Small= ; Medium= ; Sec= ; =

Default SSV equipment compatibility

Fit Bonuses

[edit]I-400 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 Submarine Radar & Passive Radiolocator	+ 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

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-400	Holo	SSV	293																																					Unbuildable

Voice Lines

Quotes

Event	Japanese/English
Introduction Play	Nice to meet you, Admiral. I'm the eldest of the Sentoku-class, the 1st ship, I-400. Hmmm... You can call me... Shio... Err... Shion.
Introduction Play	提督、ごきげんよう。潜特型の長上、一番艦、伊４マルマルです。ん…シオ…ん…そう、シオンっと及びください。
Introduction Play	Good day, Admiral. I'm the eldest of the Sentoku-class, the 1st ship, I-400, Shion. Have you gotten used to calling me by that yet? Hmm? Really? Then let's keep each other company today too!
Introduction Play	提督、ごきげんよう。潜特型の長上、一番艦、伊４マルマル、シオンです。呼び方少し馴染んできました？ん？そう？じゃあ、今日もご一緒に！
Library Play	I'm the 1st ship of the Sentoku-class, I-400-class submarines, I-400. I wasn't made for anti-ship operations but was a submarine carrier made with a new philosophy for strategic operations. Of course, my planes are Seiran. Please remember us sisters whose journeys ended before they began.
Library Play	潜特型伊４マルマル型潜水艦その一番艦、伊４マルマルです。対艦戦用戦術潜水艦ではなく、戦略運用のために建造された、新コンセプトの潜水空母なんです。もちろん、艦載機は晴嵐さん。戦う前に歩行を冷めた私達姉妹きっと覚えていてくださいね。
Secretary 1 Play	Hmmm? I can do this.
Secretary 1 Play	ん？シオン、いけますよ。
Secretary 2 Play	Ufu~ Are you going diving? I'll come too!
Secretary 2 Play	うふっ、潜っちゃいますか？ご一緒に！
Secretary 2 Play	Hmm, are you going diving? I'll come today too!
Secretary 2 Play	ん、潜っちゃいます？今日もご一緒に！
Secretary 3 Play	About the Seiran? Hmmm... So you're that interested huh. Yes! These are the floats... Right?
Secretary 3 Play	晴嵐でしょ？ん…やっぱり気になりますか？あ、はい！フロートはこっちから。うん…ね？
Secretary 3 Play	About the Seiran? Hmmm... So you're that interested huh. Ah, that's right, those are the floats... Hmmm... Right? Ah, amazing! You're good at this!
Secretary 3 Play	晴嵐でしょう？ん…やっぱり気になりますか。あぁ、そうです、フロートはこちから…ん…ね？あぁ、すごい！上手です！
Secretary Idle Play	Hmm, that's right, it'd be nice to go to a canal with Shioi.^[1] You're welcome to come along too, Admiral! I'm looking forward to it. That's right, we'll definitely go one day.
Secretary Idle Play	ん、そうですね、シオイちゃんと一緒に運河へいいですね。提督もご一緒にぜひ！楽しみです。そうですね、いつか、必ず。
Secretary (Married) Play	Ummm, are your shoulders stiff, Admiral? Shall I massage them for you? I'm pretty good at it. Ngh... Ah... your shoulders... Ngh... Ngh... H-how was that?
Secretary (Married) Play	提督、あの…肩、凝ってません？揉んであげましょうか？しおん、結構うまいんですよ？…あ、かたっ！うっ…ううっ！ど、どうですか？
Wedding Play	Did you call, Admiral? Hmm, is this for me? Can I open it? Eh... Is this... ummm, for real? Jeez, you shouldn't have.
Wedding Play	提督、お呼びですか。…ん？これをしおんに？開けても、いいですか。え…これ…あの、本当に？もー、やだ…。
Player's Score Play	Hmm... You want to see it? Understood. Information is important.
Player's Score Play	ん…見たい？分かりました！情報、大切です！
Joining the Fleet Play	1st ship of the Sentoku-class, and I-400-class submarines, I-400, sortieing!
Joining the Fleet Play	潜特型、伊400型潜水艦一番艦、伊400、出撃します！
Equipment 1 Play	Hmmm, looks good.
Equipment 1 Play	うん、いいみたい。
Equipment 2 Play	Do these good equipment suit me? Hmm, that's great!
Equipment 2 Play	良い装備、シオンに似合いますか？ん、よかった！
Equipment 3^[2] Play	Yep, I can do this.
Equipment 3^[2] Play	うん、行けそう。
Supply Play	Yep, I'm happy. This is important.
Supply Play	うん、嬉しいですね。大切です。
Docking (Minor Damage) Play	I'm gonna jump into the bath! Eh, sorry, I'll go in quietly. plop
Docking (Minor Damage) Play	お風呂にドーボーンー！えぇ、ごめんなさい、静かに入りますね。ドボン。
Docking (Major Damage) Play	I love baths. They just warm you up. Aaaah~ haaa~ Nice warm water.
Docking (Major Damage) Play	お風呂は好きですよ。暖にます。あぁ〜はぁ〜いいよ湯。
Construction Play	Yamato's dock is huge huh. Yup, the construction of a new ship is finished.
Construction Play	大和産のドック、お起きですよね。うん、新艦の建造、完了です。
Returning from Sortie Play	The fleet has returned. Good job.
Returning from Sortie Play	艦隊戻りました。お疲れ様。
Starting a Sortie Play	A canal? Or an anchorage? Yup, shall we get going? Set sail!
Starting a Sortie Play	運河？泊地？うん、行きましょうか？抜錨です！
Starting a Sortie Play	Alright, Shioi, Iyo, Hitomi, the 1st Submarine Task Force is sortieing at full strength. Set sail!
Starting a Sortie Play	いい、シオイちゃん、イヨちゃん、ヒトミちゃん、第一潜水機動部隊全力出撃。抜錨です！
Starting a Battle Play	I've found the enemy ships. All ships, please prepare for combat!
Starting a Battle Play	伊400、敵艦見ゆ。各艦、合戦用意、お願いします！
Attack Play	Ngh, alright. Let's get this started!
Attack Play	ん、よし。始めちゃいましょう！
Air Battle/ Daytime Spotting/ Night Battle Attack Play	I'm going to enjoy this.
Air Battle/ Daytime Spotting/ Night Battle Attack Play	シオンいただきますね。
Night Battle Play	Beginning pursuit. Let's do this, everyone.
Night Battle Play	追撃戦を展開します。みんな、やりますよ。
MVP Play	Oh, me? I'm glad that the Sentoku-class was able to be of use. H-huh, oh no, my tears are... Ahahaha... Why... Jeez, no.
MVP Play	おぉ、シオンが？潜特型がお役に立てて、よかった。あ、あれ、やだ、涙が・・・あははは・・・なんで・・・もう、やだ。
Minor Damage 1 Play	Ow! That hurt! What was that!?
Minor Damage 1 Play	いた！いたい！なに！？
Minor Damage 2 Play	Awha! There's so much water! S-stop it! Because I don't like this!
Minor Damage 2 Play	あわわ！水があんなに！と、止めて！いやだから、こんなの！
Major Damage Play	I-I'm hit! I-I need to surface. Ngh, I'm going to keep fighting!
Major Damage Play	や、やられた！ふ、浮上したって。ん、戦うから！
Sunk Play	Ngh, I see... so I'm sinking... I'm going on ahead alright, Shioi? Give this... bell... to that person...^[3]
Sunk Play	ん、そう・・・沈むのですね・・・シオイちゃん、先に行くね？この鐘を・・・これを・・・あの人に・・・

↑ The I-400-class were made to attack the Panama Canal.
↑ This line is shared with expedition selection, resource collection, instant repair and development.
↑ Likely referring to Captain Ariizumi Tatsunosuke, commander of Submarine Division 1 (including I-13, I-14, I-400, I-401, and I-402). After ships are sunk or scrapped, ships' bells become tangible memorials to their service. I-400's bell was recovered in March 2016 and will be displayed at the U.S.S. Bowfin Submarine Museum, pending conservation treatments.

Hourlies

Time	Japanese/English
00:00 Play	It's now, hmmm, exactly 12am, Admiral. I'll be by your side today.
00:00 Play	提督、ん、今、ちょうど午前マル時です。今日は、このシオンにおそばにいますね。
01:00 Play	It's 0100. Am I sleepy? Nah, I'm totally fine!
01:00 Play	マルヒトマルマルです。眠いかって？んん、ぜんぜん大丈夫です！
02:00 Play	It's 0200. Ngh, I'm a bit sleepy... No, I'm fine! I'm just fine! Because I'm the eldest something like this is...
02:00 Play	マルフタマルマルです。ん、少し眠く・・・いえ、大丈夫です！大丈夫！長上ですから、このくらいは・・・
03:00 Play	03...00. I'm a bit... Not sleepy at all! I can't be like this. I need to get it together! Yes, I'm ready and waiting!
03:00 Play	マルサン・・・マルマル。ちょっと眠い・・・くなってありません！もう、いやだ。ちゃんとしなきゃ、ちゃんと！はい、シオン、しゃっきりです！
04:00 Play	sleeping sounds 0...4... sleeping sounds... 00... Admiral... sleeping sounds... Shioi... wait up... sleeping sounds...
04:00 Play	はぁ・・・ぁはあぁ・・・マル・・・ヨン・・・あぁ・・・マルマル・・・提督・・・あぁ・・・シオイちゃん・・・待って・・・はぁ・・・はぁ・・・
05:00 Play	Ngh... Ah! O-oh jeez. It's 0500. You should've woken me up, Admiral! I just dozed off a little right?
05:00 Play	ん・・・あはぁ！い、いやだもう。マルゴマルマルです。提督、いやだ起こして！シオン、ちょっとしか落ちてませんよね。
06:00 Play	It's 0600. I'm going to do it now alright, Admiral? deep breath... Fleet, all hands assemble! All hands assemble! It's morning! It's a wonderful morning!
06:00 Play	マルロクマルマルです。提督、やりますね？はぁ・・・艦隊、総員起こし！僧院、お越し！朝です！気持ち良い朝なんです！
07:00 Play	It's 0700. Breakfast is ready! Today is... fufun... A heaping serving of butter rice, dried daikon miso soup and potato stir-fry! Help yourself!
07:00 Play	マルナナマルマルです。朝ごはんおもちしました！今日は・・・ふふん・・・山盛りバータライスと切り干し大根のお味噌汁とじゃがいも炒めです！召し上がれ！
08:00 Play	It's 0800. humming~ Water is important~ Water is important~ Alrighty, I'm finished cleaning up the galley!
08:00 Play	マルハチマルマルです。ふ、ふふふん〜ふ、ふふふん〜。お水は大切〜お水は大切〜よしっと、烹炊所を片付け、狩猟です！
09:00 Play	It's 0900. Now Admiral, the 1st Submarine Flotilla of the 6th Fleet is sortieing! Where are we going? To a canal? ...Eh? On an exercise?
09:00 Play	マルキュウマルマルです。さぁ、提督、第六艦隊、第一潜水隊、出撃です！どこですか？運河ですか？・・・えぇ？演習？
10:00 Play	It's 1000. Roger that, Admiral. Leave it up to the 1st Submarine Flotilla. Even at Nanao Bay or Sanza... Eh, that's not it, it's an OpFor exercise?^[1]
10:00 Play	ヒトマルマルマルです。提督、了解です。第一潜水隊演習はお任せです。七尾湾でもサンザ・・・えぇ、そうじゃなくて、対抗演習ですか？
11:00 Play	1100. So-somehow I was able to do the fleet maneuver exercise with the fleet assembled with Shioi. whew~ Hmm, next is finally time for Seiran.
11:00 Play	ヒトヒトマルマル。な、なんとか、シオイちゃんと艦隊集合、艦隊運動の演習も出来ました。はぁ〜ん、さて、次はいよいよ晴嵐さんですね。
12:00 Play	It's 1200. It's lunchtime, Admiral! It's my special rice balls for lunch! Of course, it's made with butter rice! Now, help yourself! Go on~
12:00 Play	ヒトフタマルマルです。提督、お昼の時間です！お昼は、シオン特性お結びです！もちろん、バータライスですよ！さぁ、めしあがれ！さぁ〜
13:00 Play	1300. Oh, what's wrong, Admiral? You're looking a bit... Eh, open my heart? Wh-why? I'll go get some tea first ok. Tea... Aaah!
13:00 Play	ヒトサンマルマル。おぉ、提督、どしました？顔色が・・・えぇ、胸開け？ど、どうして？とりあえずお茶をお餅しますね。おちゃを・・・ああぁ！
14:00 Play	14...0... Aaah, I'm sorry, Admiral. I got your uniform dirty... I'll go wash it! Please strip! Eh, it's fine. Ngh, why? Why are you resisting, Admiral? Jeez!
14:00 Play	ヒトヨン・・・マル・・・あはぁ、ごめんなさい提督。制服をお汚してしまって・・・シオン、お洗濯します！脱いでください！えぇ、いいから。ん、なんで？なんで抵抗するですか、提督？もう！
15:00 Play	It's 1500. I'm sorry, I didn't mean it like that... I've caused you so much trouble, Admiral... Ummm, I'll do my best with dinner...
15:00 Play	ヒトゴマルマルです。ごめんなさい、そういう意味ではなくて・・・提督、シオンご迷惑ばかりおかけして・・・あの、晩御飯、頑張るので・・・
16:00 Play	160... Ah, Iyo, Hitomi, good work. Yup, we did form a submarine carrier fleet as the 1st Submarine Flotilla along with Shioi. My tears just flow when looking at the beautiful sunset for some reason. Yep, am I right?
16:00 Play	ヒトロクマルマ・・・あぁ、イヨちゃん、ヒトミちゃん、お疲れ様です。うん、シオイちゃんと四人で第一潜水隊、潜水空母艦隊、集結ですね。なんか、夕日が綺麗で泣けできちゃ。うん、ね？
17:00 Play	It's 1700. I want to keep watching the sunset on these peaceful seas along with the rest of the submarine carrier fleet, Admiral. Yeah... Always.
17:00 Play	ヒトナナマルマルです。提督、このまま潜水空母艦隊と一緒に、この静かの海で夕日をいつも見ていたいですね。いつまでも・・・うん。
18:00 Play	It's 1800. The sun has set, Admiral. Hmmm, that's right, I need to prepare dinner. Please look forward to it, Admiral.
18:00 Play	ヒトハチマルマルです。提督、日が落ちてしまえましたね。ん、そうだ、晩御飯の準備はしないと。提督、楽しみにまっていてくださいね。
19:00 Play	It's 1900. It's time for dinner. I'm sorry to have kept you waiting, Admiral. It's fine, don't worry, it's my special Submarine Curry on the menu tonight. Of course, the rice is butter rice! Now, help yourself!
19:00 Play	ヒトキュウマルマルです。晩御飯の時間です。提督、お待ち遠様。大丈夫、安心して、晩御飯のメーニュは、シオン特性潜水艦カレーです！もちろん、ご飯はバータライスですよ！どぞ、召し上がれ！
20:00 Play	It's 2000. You're sweating so much, Admiral... Ah, it's fine there's enough for seconds. It's fine, don't be shy! Here's a large helping for you. Ehe, please help yourself to all of it.
20:00 Play	フタマルマルマルです。提督、そんなに汗をかいて・・・あぁ、大丈夫、おかわりもありますよ。いいんです、遠慮しないで！はい、大盛りです。えへ、どぞ、たんと召し上がってね。
21:00 Play	It's 2100. You don't look so good again, Admiral... Are you feeling sick? ...Hmmm, I know I have a special onion. Shall I get you a piece? It's very valuable.
21:00 Play	フタヒトマルマルです。提督、また調子悪そう・・・体調不良でしょうか。ヴィタミン不足かも・・・ん、そうだ、とっておきの玉ねぎがあるんです。一欠片させあげましょうか？貴重品ですよ。
22:00 Play	It's 2200. Thank goodness you're feeling better, Admiral. Yeah, I was worried. Eh? Me? I'm just fine. I can even go on another dive.
22:00 Play	フタフタマルマルです。良かった、提督元気になって。うん、心配しました。えぇ？シオン？シオンは平気です。もう一潜りできるくらいです。
23:00 Play	It's 2300. Thank you so much for your hard work today, Admiral. Let's do our best tomorrow too. Now, please get into your futon. Just sleep for a while. See you tomorrow.
23:00 Play	フタサンマルマルです。今日はほんとにお疲れ様でした、提督。明日もご一緒に頑張りましょう。さぁ、少しお布団にドボンくしてださい。少しだけ、おやすみなさい。また、あした。

↑ As in playing the enemy force.

Seasonal

Ship	Japanese/English	Notes
Christmas 2017 Play	Merry Christmas, Admiral. Oh, what’s that… Ro? Wow, it’s delicious. Is this a cake from your country?
Christmas 2017 Play	メリークリスマス、提督。あら、ローちゃん…それは？うわぁ、美味しいぃ。お国のケーキね？
End of Year 2017 Play	Yes, it’s the Naval Base’s Year End Spring Clean. We of the 6th fleet will do our best to help out. The back of my Seiran hangar also needs…
End of Year 2017 Play	はい、鎮守府年末大掃除ですね。我が第六艦隊も、しっかりやりましょう。晴嵐格納筒も、奥の方が…
New Year 2018 Play	Happy New Year, Admiral. Please take good care of the 6th Fleet and the 1st Submarine Division this year too.
New Year 2018 Play	提督、謹賀新年です。今年も第六艦隊、第一潜水隊を、どうぞよろしく申し上げます！
Setsubun 2018 Play	It’s not “Settsubuun” but “Setsubun”. Eh? Mmm, I told you the pronunciation was wrong… Hu-huh?
Setsubun 2018 Play	「セッツブーン」じゃなくて、「節分」ですよ。えぇ？ん、だから発音は節分ですって…あ、あれ？
Valentine’s Day 2018 Play	Please accept my handmade chocolates, Admiral! I made it quite fancy. You open it up here, and then…
Valentine’s Day 2018 Play	シオンの手作りチョコ、提督、受け取ってください！結構凝った作りなんです。ここ開けて、こうして…
White Day 2018 Play	How were my hangar-type chocolates, Admiral? Were they to your liking? Ah, that’s great.
White Day 2018 Play	提督、シオンの格納庫型チョコいかがでしたか？気にいていただけました？あぁ、良かった。
Coming of Spring 2018 Play	The sakura are beautiful. Hmmm… I know, cherry blossom viewing! We can go with the other members of Nanao Bay. I can’t wait.
Coming of Spring 2018 Play	桜、きれいですね。ん…そう、お花見！七尾湾のメンバーでいきましょう。楽しそうぅ。
5th Anniversary Play	I heard about it, Admiral. It’s the fleet’s 5th Anniversary! Isn’t this wonderful? I’m grateful to everyone. I’d like to be with you next year too.
5th Anniversary Play	提督、お聞きしました。艦隊は五周年だそうです！素晴らしいですね？皆さんに感謝です。シオン、来年と提督と一緒に、いたいです。
Rainy Season 2018 Play	I won’t say that it’s just because of the season but… Somehow this season… kinda makes me want to hide… Why? Open the vents! Crash dive! Shion, hiding!
Rainy Season 2018 Play	梅雨だからっと言うわけではないんですけど…何か、この季節は…ちょっと隠れたくなる…なぜ？ベント開け！潜行急げ！シオン、隠れます！
Late Autumn 2018 Play	It's gotten really cold. It's the time of year when us submarine carriers want to get under the kotatsu too. Hmmm... I want to... dive right in! Whoaaa... Aaaah, it's warm... Mmmm.
Late Autumn 2018 Play	めっきり寒くなりました。私達潜水空母も、おこたに入りたくなる季節です。ん…おこたに…ドボン！うわぁ…あぁ、あったかい…うん。
7th Anniversary 2020 Play	Admiral, I heard the news. It's finally the fleet's 7th Anniversary! Isn't that wonderful? I'm thankful to everyone. I want to... keep making a splash with you forever, Admiral!	Secretary 2
7th Anniversary 2020 Play	提督、お聞きしました。艦隊は、ついに七周年！素敵なことですね？みんなさんに感謝です。シオン、提督とずっとご一緒に…ドボンしたいです。	Secretary 2
8th Anniversary Play	Admiral, I've heard the news! It's really the fleet's 8th Anniversary. That's such wonderful news. I'm grateful to everyone. I want to be with you for ever and ever...
8th Anniversary Play	提督、お聞きしました！艦隊はついに、ついに八周年。本当に素敵なことです。皆さんに、感謝です。シオン、提督とずっとずっと、ご一緒に…

CG

Regular
Base Base Damaged

Trivia

General Information

Her nickname, "Shion", is an alternate reading of "400". 4 = "Shi"; 00 = "On".
She was launched on the 18th of January 1944.
Surrendered on the 27th of August 1945 and sunk as target on the 4th of June 1946.
Wreck located on the 1st of August 2013 southwest of Oahu, Hawaii in 557 m (1826 ft) of water. Her hull is missing fifty feet of the bow and shows signs of heavy implosion damage. The superstructure is missing, having apparently detached from the hull during her final descent to the ocean floor.
Her bell was recovered from a debris field near her wreck and is planned for display at the USS Bowfin Submarine Museum & Park in Pearl Harbor.

Update History

She was added on the 17th of November 2017 as Fall 2017 Event E3 drop.

Misc

Survived World War II.