Modernization
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Modernization is used to increase the Stats of a given ship, namely, the firepower , torpedo , antiair , armor , HP , ASW , and Luck . 1 to 5 other ship girls are required in order to perform a Modernization.
 This page is about the Modernization mechanic. Please see Remodel_(Menu) for information about the UI.
How To Modernize
 Click the Select (選択) button in the empty modernization slot to bring up a list of nonlocked ship girls sorted by level.
 Select a ship girl to be placed in a modernization slot.
 Stats that will be improved will turn blue and show the potential maximum improvement.
 HP, ASW, and Luck will just display a blue up arrow.
 Once the selection is made, click the Begin Synthesis!! (合成開始!!) button to modernize.
 The button will be greyed out if the ship girl cannot be modernized any further.
Overview
 Modernization upgrades for firepower, torpedo, AA, and armor are reset upon remodeling.
 HP, ASW, and luck modernization upgrades are carried over.
 Equipment on a ship girl used for modernization will be lost.
 Remember to remove valuable equipment before using a ship girl as modernization fodder.
 Stats cannot be increased beyond certain caps.
 For firepower, torpedo, AA, armor, and luck; it is dependent on the ship girl and its remodels. Please see the individual ship girl pages or Ship Maximum Status for the caps.
 For HP, it is +2.
 For ASW, it is +9.
 Locking ship girls will prevent them from showing up as modernization fodder.
General Modernization
This applies to firepower , torpedo , antiair , and armor . The formula for bonus stats from Modernization to these stats is:
Modernization Stat Formula  

 

Input Value  1  2  3  4  5  6  7  8  9  10  11  12 

Success  1  2  3  5  6  7  8  9  11  12  13  14 
Failure  0  1  2  2  3  4  5  5  6  6  7  7 
Efficiency %^{[1]}  50  75  83.3  87.5  90  83.3  85.7  87.5  88.9  90  86.4  87.5 
Input Value  13  14  15  16  17  18  19  20  21  22  23  24 
Success  17  18  19  20  21  23  24  25  26  27  29  30 
Failure  8  8  9  9  10  11  11  12  12  13  14  14 
Efficiency  88.5  89.3  90  87.5  88.2  88.9  89.5  90  88.1  88.6  89.1  89.6 
Input Value  25  26  27  28  29  30  31  32  33  34  35  36^{[2]} 
Success  30  31  32  33  35  36  37  38  39  41  42   
Failure  15  15  16  17  17  18  18  19  20  20  21   
Efficiency  90  88.5  88.9  89.3  89.7  90  88.7  89.1  89.4  89.7  90   
Special Modernizations
When using certain ships, it is additionally possible to modernize HP , ASW , and Luck .
Ships used as fodder  Modernization get  Affected ships  Notes 

Maruyu  +1.2  All  5 Maruyu Kai should always be used at once 
Maruyu Kai  +1.6  
1 DE  +1/2 /or/ +1/2  All for & All with initial base for 
Using higherlevel DE increases the chance of gaining +2 of a stat 
2 DE of different classes  
2 same DE  
2 different DE of the same class  +1/2 /or/ +1/2  
Pumpkins  +1/2/3  All  Requires the use of duplicates or same class ships to gain more luck 
Kamoi  +1/2  Only Mizuho, Kamoi, Aganoclass, Yamatoclass  +30% per base AV/AO +40% per Kai+ AV/AO 
Mizuho  +1/2  Only Mizuho, Kamoi 
 Notes
 It is unclear if using more than 2 DE is taken into account. If it is, the speculated working is:
 Using 4 DE will count as 2 pairs,
 Using 3 or 5 DE with count as 1 or 2 pairs, and a single ship.
Luck Modernization
Luck can be modernized either by using Maruyu or DEs. Remember that luck modernization is not reset on remodel.
 Notes
 Modernization success is guaranteed if using 5 Maruyu.
 This is why it is very important to remodel her to Kai before using her as modernization fodder.
 Maruyu is the easiest and most efficient method to modernize luck. It is highly advised to save DEs to modernize HP.
Maruyu
A base remodel Maruyu will provide +1.2 luck while her Kai remodel provides +1.6 luck. Refer to the chart below for Modernization results:
Success/Failure (Expected Result) 
Base Remodel  

0  1  2  3  4  5  
Kai Remodel  0    2/1 (1.2) 
3/2 (2.4) 
4/3 (3.6) 
5/4 (4.8) 
6/ (6.0) 
1  2/1 (1.6) 
3/2 (2.8) 
4/ (4.0) 
6/5 (5.2) 
7/6 (6.4) 
  
2  4/3 (3.2) 
5/4 (4.4) 
6/5 (4.6) 
7/6 (6.8) 
    
3  5/4 (4.8) 
6/ (6.0) 
8/7 (7.2) 
      
4  7/6 (6.4) 
8/7 (7.6) 
        
5  8/ (8.0) 
         
Coastal Defense (DE)
DE have a chance of granting +1 luck when used alone or in pairs.
 For single DE:
[math]\displaystyle{ \text{LUCKmod}_\text{Rate}\text{%} = 29 + 0.8 \times \text{Lv} }[/math] 
 For DE pairs:
[math]\displaystyle{ \text{LUCKmod}_\text{Rate}\text{%} = 100  \text{X}_\text{Rate}\text{%} }[/math] 
 With
 [math]\displaystyle{ \text{Lv} }[/math] the level of the DE used in the modding,
 [math]\displaystyle{ \text{X}_\text{Rate} }[/math] either the ASW or HP modding rate from the below formulas.
Notably:
 +1 luck or HP is guaranteed from upgrades of pairs of different DE from a same class.
 +1 luck or ASW is guaranteed from upgrades of single DE of any other pairing.
 If the total level of 2 DE is around 80+ (e.g. each of them lv 40+), there is a small chance (~67%) for an extra +1 luck
 In the case the ship cannot receive one of the 2 guaranteed stats (e.g. a BB for ASW) then there is a chance to fail the modernization.
Pumpkins
It is possible to use the Pumpkins given during the Pumpkin Festival to increase luck during regular modernization.
 See here for more details.
ASW Modernization
ASW increase is capped at +9. Currently, DEs are the only way to modernize ASW.
 Modernization is only possible for ships that already have some base ASW stats.
 Modernization will fail if the ship girl is at the ASW cap.
 Modernization can still succeed if luck is rolled instead of ASW (if the ship girl is not at her luck cap).
Using single or a pairs of DE that are not different DE of a same class will guarante +1 ASW or +1 Luck.
 It has been observed that, the higher the total level of two DEs used for modernization, the higher is the chance to get +1 ASW.
The ASW mod success rate compared to the Luck mode is approximately as follows [1]:
 For single DE:
[math]\displaystyle{ \text{ASWmod}_\text{Rate}\text{%} = 100  \text{LUCKmod}_\text{Rate}\text{%} }[/math] 
 For DE pairs:
[math]\displaystyle{ \text{ASWmod}_\text{Rate}\text{%} = 10 + 0.40 \times \sum_\text{DE} \text{Lv} }[/math] 
 With
 [math]\displaystyle{ \text{Lv} }[/math] the level of the DE used in the modding.
 [math]\displaystyle{ \text{LUCKmod}_\text{Rate} }[/math] the luck modding rate from the above formula.
 Notably :
 If the total level of both DE is around 80+ (e.g. each of them lv 40+), the rate is about 2030 %.
 Using two DE pairs with a level total at 180+ has a chance of +2 ASW.
HP Modernization
HP can be increased by using DEs, Mizuho, or Kamoi. DEs must be used in pairs of two different ship girls from the same class to get +1 HP.
For unmarried ships, HP can always be increased by a maximum of 2 points. Exceptions for married ships are:
 Capped at +1 after marriage:
 No HP modernization kept:
 BB: Nagato Kai/Ni, Mutsu Kai/Ni, Yamato (base), Musashi (base), Nelson Kai, Rodney Kai, Colorado Kai, Maryland Kai, Nevada Kai/Mod.2
 FBB: Bismarck/Kai/Zwei/Drei, Richelieu (base), Littorio/Italia, Roma/Kai, South Dakota Kai, Washington Kai,
 SS(V): I168 Kai, I8 (base), I36 (base), I400 (base), I401 (base), Maruyu (base)
 AO: Hayasui Kai,
Using pairs of different DE from the same class will guarante +1 HP or +1 Luck.
 It has been observed that, the higher the total level of two DEs used for modernization, the higher is the chance to get +1 HP.
 The HP mod success rate compared to the Luck mode is approximately as follows [2]:
[math]\displaystyle{ \text{HPmod}_\text{Rate}\text{%} = 30 + 0.35 \times \sum_\text{DE} \text{Lv} }[/math] 
 With
 [math]\displaystyle{ \text{Lv} }[/math] the level of the DE used in the modding.
 Notably :
Mizuho and Kamoi (AV/AO) can be used to increase the HP of certain ships.
 Mizuho: Mizuho and Kamoi.
 Kamoi: Mizuho, Kamoi, Aganoclass, and Yamatoclass.
 Kamoi and Mizuho are not interchangeable.
 Mizuho or Kamoi must be used in pairs to trigger HP modding,
 The HP mod success rate compared to the Luck mode is as follows :
[math]\displaystyle{ \text{HPmod}_\text{Rate}\text{%} = 30 \times \text{N}_\text{b} + 40 \times \text{N}_\text{K} }[/math] 
 With
 [math]\displaystyle{ \text{N}_\text{b} }[/math] the number of AV/AO on base form,
 [math]\displaystyle{ \text{N}_\text{K} }[/math] the number of AV/AO on Kai+ form.
Notably, if the success rate goes over 100%, a roll for a second HP increase is performed (e.g. 120% = 20% chance for +2HP).