General multiplicative bonuses

These bonuses depend on the enemy targeted, as well as the equipment used.

A1[1]
Installation Type Soft-Skinned Hard-Skinned
  Pillboxes 
 
 
 
 
Isolated Island Princess Pillboxes Harbour Summer Princess
Number Equipped Single Multiple Single Multiple Single Multiple Single Multiple
  AA Shells 
 
 
2.5 1.75 1.75
  AP Shells 
 
 
1.85 1.3
  WG42 (Wurfgerät 42)  1.3 1.821.3 * 1.4 1.4 2.11.4 * 1.5 1.6 2.721.6 * 1.7 1.4 1.681.4 * 1.2
Type 4 Anti-Ground Rockets 
 
1.25 1.8751.25 * 1.5 1.3 2.1451.3 * 1.65 1.5 2.71.5 * 1.8 1.25 1.751.25 * 1.4
 Other ASW Mortars 
 
1.2 1.561.2 * 1.3 1.2 1.681.2 * 1.4 1.3 1.951.3 * 1.5 1.1 1.2651.1 * 1.15
  Dive Bombers 1.4 2.451.4 * 1.75 1.5 3.01.5 * 2 1.3 1.561.3 * 1.2
 Bomber  Seaplane Bombers/Fighters 1.2 1.5 1.3
  Landing Craft Type Multiplier 1.4 1.8 1.8 1.7
  Toku Daihatsu 
Toku DLC + Panzer III [2]
Toku DLC + Panzer III J 
1.15 1.15 1.15 1.2
DLC + T89 tank 
Toku DLC + Ho-Ni tank 
Toku DLC + Panzer III [2]
Toku DLC + Panzer III J 

Counts for Multiple only [3]:
Toku DLC + Chi-Ha 
Toku DLC + Chi-Ha Kai 
[4]

1.5 1.951.5 * 1.3 1.2 1.681.2 * 1.4 1.5 2.11.5 * 1.4 1.6 2.41.6 * 1.5
DLC + Panzer II  1.5 1.951.5 * 1.3 1.2 1.681.2 * 1.4 1.5 2.11.5 * 1.4 1.6 2.41.6 * 1.5
M4A1 DD 
Toku DLC + Chi-Ha Kai [4]
Toku DLC + Panzer III J 
1.1 1.8 2.0 2.0
Armed Daihatsu 
Soukoutei 

☀ Day Only

1.1 1.211.1 * 1.1 1.3 1.431.3 * 1.1 1.3 1.561.3 * 1.2 1.5 1.651.5 * 1.1
  Ka-Mi tank  1.5 1.81.5 * 1.2 2.4 3.242.4 * 1.35 2.4 3.242.4 * 1.35 2.8 4.22.8 * 1.5
Ka-Tsu tanks 
 
Unknown yet
Ka-Tsu tank Kai  Unknown yet
  Landing Forces Unknown yet
  Improvement   Landing Craft 1 + (Average   /50)
(  1.2x)
  Ka-Mi tank  1 + (Average   /30)
(  1.33x)
  Ka-Tsu tanks 
 
1 + (Average   /50)
(  1.2x)
Notes
  • The Improvement Bonus takes the average for all Landing Craft equipped on the ship.
  • The Improvement Bonus takes the average for all Special Amphibious Tanks equipped on the ship.
  1. Last time updated: 09/10/2022, source:https://nga.178.com/read.php?tid=33769345&rand=329
  2. 2.0 2.1 https://twitter.com/Divinity_123/status/1695813425660661965
  3. For example: vs Soft-Skin, 1 Chi-Ha  = no bonus, 2 Chi-Ha  = 1.3 (1.95/1.5), 1 T89  + 1 Chi-Ha  = 1.95
  4. 4.0 4.1 https://docs.google.com/document/d/1y8kisQTFuAd57GFAQRpJzPOEk9kpUzoEf1sxmnywx3A/edit#heading=h.hycuzmt5tebu, TsunDB, confirmed except Harbour Summer Princess