This article aims to provide advice on the better ways to farm for certain ships in order to use them as Modernization fodder. Those ships notably include:

Maruyu for luck modding
DE for HP/ASW/Luck modding

Maruyu

Maruyu Kai is the best way to reliably modernize the luck of any ship in the game.

For more information on this topic, see Maruyu modding.

LSC

Maruyu is a reliable LSC craft

She can be crafted by using the minimum resource amounts.
Her crafting rate can be improved by crafting with as few "free docks" as possible.
LSC attempts are advised only when reaching the resource caps in order to avoid wasting any resource gains.

Maruyu
					Note
1500	1500	2000	1000	1	Recommended recipe

Notes Unlike other recipes, the number of free docks should be minimum (ideally 1).

Sorties

Dropping Maruyu is usually the best way to farm her as it is generally cheaper than the LSC cost.

3-5

3-5 is the best place to farm Maruyu, being relatively cheap and fast. The main downsides are the morale drain resulting from ending the sortie on an "off-route node" and the low amount of ranking points awarded.

It is important to first clear the map in order to have the proper drop rate.

Drop rate:

Enemy Compositions	HQ ≥ 85	HQ ≤ 84
	1.4%	0%
Last Dance Post-Clear	2.5%
All Other Enemy Compositions	0%

This means it is impossible to get her here if the HQ is 84 or lower.

Expand3-5 Farming

4-5

4-5 has one of the cheapest comps to farm Maruyu and awards a large amount of ranking points relatively quickly. The main downside is the drop rate is reduced significantly when owning any copies of her.

Drop rate:

Enemy Compositions	0 Maruyu	1+ Maruyu
	3%	1.75%
All Other Enemy Compositions	2%	0.75%

Therefore, it's only recommended to farm Maruyu here with 0 owned copies in the base.

Expand4-5 Farming

Node T flagship is a soft-skin installation , requiring equipment such as

AA Shells and

Landing Equipment to deal with her.

2 DDs should be capable of carrying / and Armor Bulges to increase the pass rate. They should also be able to do decent OASW damage to deal with submarines. Therefore, the best setup for them should be a strong special DLC/Tank + Sonar + 2 Bulges (One bulge in RE).

As of January 2025, the most effective special DLC/Tank that can deal with Harbour Princess
alone (Hitting the day cap of 220 base damage before armor) are as follows (From strongest to weakest):
If married, it's possible to perform OASW with only 1 sonar. If not married, it's recommended to prioritize Sonar + Depth Charge setup to enable it, removing one bulge to keep the passing rate high.

The last DD should be the one doing AACI duty, preferably Hatsuzuki Kai Ni as she has an extra slot to bring along an extra WG42 as well.

If she is married and is a high enough level, she can also OASW with 1 sonar and help with the sub node.

For the comp using Nelson-class, it's best to utilize her touch at node H.

As a result of using only one carrier filled with Jets, AS/AS+ isn't possible, so it's best to settle with AP.

All comps listed above have some upsides and downsides mainly due to the usage of Jets, so it's up to players to decide which comp is best for them:

The comps with 3-4 Jets generally has a higher passing rate, which also helps reduce the chance of taking damage, and lower the Fuel, Ammo, and Bauxite usage in general. In exchange, there is a 50% higher Steel cost compared to min LSC.
- This is generally not a problem for players who spam Tokyo Express Expeditions a lot. Furthermore, steel isn't used much over time anyway.
On the other hand, the comp without Jets are more efficient for all resource in the long run as you will spend less of them for the same rate of Maruyu as min LSC (assuming no owned copies of her when farming here, as having her copy would reduce her rate significantly). But the passing rate for these comps are also lower.

6-2

Drop rate: 2.0 %

Expand6-2 Farming

DE

DE are the best way to modernize the HP of any ship in the game, as well as the only way to modernize ASW and a good way to modernize Luck.

For more information on this topic, see DE modding.

Sorties

DE can only be obtained via drops, and only limited time drops so far. Thus, there is almost no truly reliable way to farm them.
Unlike any other ship type in the game, DE are subject to unique drop cap behavior, similar to overfishing.
- To farm for them efficiently, knowing how their drop mechanic works is important.
  - Having more than 3 duplicates of a certain DE will decrease its drop rate on all maps.
  - Using an individual DE as fodder 10+ times will start decreasing its drop rate on all maps, as seen in map 1-3. It's safe to assume the same counter is applied for map 7-4.

For more information on this topic, see Overfishing Cap.

7-4

So far, only 7-4 has a constant set of DE drops, making it a reliable farming location.

Drop rate:

The drop rate of all DE here depends on the above-mentioned drop behaviors, as well as the current limited drop pool.
To check their drop rate, please refer to KcNav or PoiDB.

Expand7-4 Farming

4 OASW (with 3 strongs) is the absolute minimum requirement to stabilize the route. Fewer than 4 will increase the retreat rate.

A "strong OASW" is defined as a setup utilizing ASW Synergy (Small Sonar + Depth Charge). For Hyuuga Kai Ni, Helicopter + Zuiun (Kai Ni) + Sonar will also work.
It is important to keep in mind that most retreats here are due to submarines. Especially at HQ 120 where 7-4 is mutated into its last scaling stage, node J always has 3 So-Class Flagship, the boss gains more armor, and the boss node in LD always has a So-Class Flagship as well, making farming more difficult if lacking enough strong OASW.

CVE should be either Zuihou or Ryuuhou for OASW. While not as strong as the strong OASW setup above, they can still sink some weaker submarines on the way.

An AACI is recommended to disable the boss and pass node E on the way. There are a few compositions to pick from depending on who is on AACI duty (the clear rates generally do not differ much from one another).

Atlanta: All 3 DD can TCI (works better for 4-slot DD and Shigure Kai Ni/San with a RE, as they can keep their strong OASW setup on top of it).
Maya Kai Ni: Same idea as above, but Maya can bring Night Recon to increase night accuracy for the whole fleet.
DD such as Hatsuzuki Kai Ni or Fletcher: The CL can be Yahagi Kai Ni B for opening torpedo, or CA(V) like Mogami Kai Ni Toku for Night Zuiun Cut-In.

Hyuuga Kai Ni should not have the usual 2 gun setup as it does not work well there, reducing the clear rate. It is better to give her 2 fighters to carry air power, along with 3 other equipment that can deal with submarines as mentioned above.

All DE have damage, accuracy, and evasion bonuses here, so they can be a good option to bring along. One of them can be used as flagship to get as much EXP as possible, making this map one of the best options to grind them.

Shigure also has great accuracy and evasion bonuses (but no damage bonus), being the only DD with any bonus here, making her a great DD pick when paired with her above mentioned RE capability.