The Emperor of the European youkai has been resurrected. "There is only one path left to you. Ruin!" Backbeard has joined forces with Nurarihyon and devoured a city. It has caused humanity's loathing of youkai to increase. Anti-youkai laws are established, and the government takes out one youkai terrorist after another. Amidst all this, the youkai hatred of humans grows. The wave of feeling swamps the GeGeGe Forest and anti-human youkai begin to appear. In order to prevent humans and youkai from clashing, Kitaro goes to the prime minister, determined to bring her around.
Together with the Japanese yokai,
Nurarihyon, I now declare war.
،بالتعاون مع اليوكاي الياباني نوراريهيون
.أعلن هاهنا الحرب
Zusammen mit dem japanischen Yōkai
Nurarihyon erkläre ich euch den Krieg.
Les declaro la guerra junto 
al yokai japonés Nurarihyon.
Os declaro la guerra junto
al yokai japonés Nurarihyon.
C’est avec mon allié japonais Nurarihyon
que nous vous déclarons la guerre.
Insieme allo yōkai giapponese Nurarihyon, 
qui vi dichiaro battaglia.
Junto com o Yokai japonês,
Nurarihyon, eu declaro guerra.
Мы с японским ёкаем 
Нурарихёном объявляем войну.