Declaration of War is the 193rd chapter of Shokugeki no Soma.
Sōma Yukihira continues on discussing their plan on taking over the Elite Ten. Much to their surprise, Takumi Aldini and Megumi Tadokoro warned Sōma about his hastiness in challenging the remaining Elite Ten members. Takumi said there is no point in thinking about their chances of winning because Central will surely reject his challenge. Megumi is also worrying because she lacks confidence. Sōma then tried to consult the members of the Elite Ten if they could accept the challenge.
He approaches Rindō Kobayashi, and mocks him as always. She notices the seemingly depressed-looking Erina Nakiri and told her to cheer up. After saying Sōma's plan may be unrealistic, she runs away from the room to go to her father, whom she believed in Tokyo. Rindō told Erina that Azami Nakiri is not in Tokyo and is at the venue as a stopover while traveling to an another event. Azami is at the roof at the moment, so Erina rushed immediately to the roof along with the others.
After arriving at the roof, Sōma challenges Azami to have a full-on fight between his team and the Elite Ten. Azami did not accept the challenge as expected. However, much to their surprise, Jōichirō Yukihira and Senzaemon Nakiri are also at the roof. After meeting Azami, Jōichirō challenged him to Tōtsuki's traditional irregular Shokugeki, thinking that Sōma's proposition should not be thrown away.