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12/25 (Tue) to 1/8 (Tue)

It is a drop event with a Water bonus. Complete the map to have a chance for a castle to drop. If they do not drop, the next completion has a higher chance of dropping. Difficulty does not affect drop rates or rarities as far as we know. Only the event map itself affects the drop rarity. The easier maps (E-1, E-2) are much less likely to drop the ☆4 units, and the harder maps (E-3+) almost only ever drop ☆4. As a note, E-X1 and E-X2 drop 3 and 4 jinmusume from their warehouses respectively, so they are a good place to level one girl while farming.
The chance brackets are
1~2 Slightly increased chance
3~7 Increased chance
8+ Greatly increased chance

Rewards are
★4 Ise-Nagashima-jou


Skill: Increases HP by 100 and ATK and DEF by 10 for all castles in range for each upgrade
Stratagem: Increases ATK and ASPD by 20% and decreases Range by 10% for all castles in range for 30s. (Range: Large)
Cost: 7 ki
Cooldown: 50s

★2 Matsukura-jou [Mountain] [Sword]


Skill: Increases DEF by 25%
Kai Skill: Increases DEF by 25% and Range by 20

E-1
Special Mission: Complete without gigantifying (any difficulty)
Reward: 5000 Gold


E-2
Special Mission: Complete without taking any damage on Tono (any difficulty)
Reward: Tsubasa [Kai-ichi]



E-3
Special Mission: Complete without losing any warehouses (any difficulty)
Reward: Byakusen [Kai-ichi]



E-X1
Special Mission: Complete without losing any warehouses (any difficulty)
Reward: ★2 Matsukura-jou
Special Mission2 : Complete without losing any warehouses (hard only)
Reward: ★3刀 蛇刀(+3)


Matsukura's skill increases DEF by 25% and Range by 20.
Furthermore, she will deal increased damage when there are fewer targets.




E-4
Special Mission: Complete without taking any damage on Tono (any difficulty)
Reward: Byakusen [Kai-ichi]


E-5
Special Mission: Complete without taking any damage on Tono (any difficulty)
Reward: Tsubasa [Kai-ichi]


Boss can hit 23/26/27/28/30.

If you don't kill the rammers at the top right, they backdoor you at 3.
If you don't kill the elephant as it crosses the bridge at the bottom, it goes 24-20-17-14-11-2 and backdoors you at 1.

Boss has multiple parts that shoots arrows, so she can target multiple castles if they're at different ranges, or otherwise focuses one castle fairly hard. They also have greatly increased ASPD, decrease Delay, and increased Range.
You can ignore it for the most part and set up on the safe tiles.

E-X2
Special Mission: Complete without losing any warehouses (any difficulty)
Reward: ★4 Ise-Nagashima-jou
Special Mission2 : Complete without losing any warehouses (hard only)
Reward: ★3鉄砲 雷光の中筒(+3)


This battle features [New Year's] Oosaka-jou as a helper.
She cannot be deployed or retreated, but you can upgrade her and use her stratagem to help your battle.

This battle features roped warehouses that give better items as rewards if defended.
Work together with [New Year's] Oosaka-jou to protect them.

The following enemy castles have various effects active
Matsukura: increases DEF by 25% and Range by 20.
Furthermore, she will deal increased damage when there are fewer targets.

[New Year's] Himeji-jou: Increases ATK by 30%, decreases Delay by 20% for all enemy castles in range.
Ise-Nagashima-jou: Increases HP by 400, ATK by 40 and DEF by 40 for all enemy castles only. She does not heal enemies, but also cannot be targeted. Defeating all other enemies will lead to victory.

The assault-type costumed kabuto have various effects.
Lion Dance: Increases HP by 20% for all kabuto
New Year's Hakama: Upon the attack impact, decreases ASPD by 50% for all targets in range by 5s.

[New Year's] Oosaka means you get a free healer. You can position around 16 to make the most use out of her.
There's some tanky enemies that will walk through, so you can block them here while being healed and supported.
Some swarms also appear around 26-30-27 to attack C, so you can defend on that spot pretty well too.
There will also be enemies that go 18-22-25-28-32-29 to pincer you which can be troublesome since it's pretty far away from Oosaka.
A can be vulnerable to anything that gets across the bridge like this, and otherwise is very threatened by the metal eagles.
C is in danger when the large pack of flyers goes to the top right, as they can just ignore 30 and attack C.