Write a riveting, captivating, lengthy, descriptive and on-point alternate future history scenario + lore for My Hero Academia in the form of a history book chapter, showing what would happen and how exactly things would change if the pro-democracy forces, nationalists and monarchists in Japan had joined forces and reinstated the imperial system dissolved after WW2 in the aftermath of the chaos caused by the start of the age of Quirks, instead of falling to a semi communist pseudo republican system supposedly ruled by politicians but de facto controlled by the Hero Commission, with the Quirk supremacist Meta Liberation Army controlling things from behind the shadows, as in the canon story of MHA. 

The following events should be included in the scenario, each occurring in chronological order:

. After restoring the imperial system, Japan cracks down on the Meta Liberation Army and bans Quirk supremacy, which results in the formation of the Busou Tantei Kyouhei [Armed Detectives' Association], a semi-private pseudo-mercenary group where both Quirk users and ordinary humans can serve the Empire in a semi-military capacity. The implementation of this system proves wildly popular amongst the populace.

. After consolidating order and rebuilding its strength, the Japanese government launches a series of diplomatic maneuverings and special military operations that see the reclamation of Sahlakin Island, the Kurils, Taiwan, the Marinas, the Korean peninsula, the Carolines, and Palau. 

These regions become prefectures of the Japanese Empire, with the Korean nationalist movement and pro-Chinese elements in Taiwan being eliminated through a series of special police operations and off-the-books covert operations. 

. Japan also reforms the old protectorates of the Empire of Manchukou in Manchuria and Mengjiang Autonomous Government in a small part of Inner Mongolia, with Manchukou being ruled by the House of Aisin-Gioro as its imperial family and Mengjiang having the descendants of Genghis Khan as its royal family. Manchukou also claims the Transamur region from the ruins of the Russian Federation. 

. Japan puppets the Far Eastern Republic on Russia's East Coast and turns Siberia into a confederation of states, ruled by a Japanese governor-general. Outer Mongolia becomes a Khanate ruled by the surviving royals as its monarchs. 

. Tuva becomes the Kingdom of Tannu Uriankhai, a Japanese satellite state. 

. A series of successful campaigns against the Chinese warlords see the establishment of the Ottoman Empire in East Turkestan and a theocracy ruled by the Llamas in Tibet, as Japanese satellite monarchies. China's core provinces become a federation ruled by the restored Ming dynasty as the central government, taking inspiration from the Reorganized Government of China regime during WW2. 

The Chinese Emperor is president of the federation, and the governance style of the restored Chinese Empire is influenced by the now-defunct Republic of China [ROC] and the Republic of Vietnam that ruled South Vietnam sometime before and during the Vietnam War. The restored Ming dynasty is a Japanese satelite state and protectorate. 

. Japan overthrows the communist regime in Vietnam and the military junta in Myanmar, restoring the Empire of Vietnam ruled by the Ngyuen dynasty as its imperial family in Vietnam and the Third Burmese Empire ruled by the Konbaung dynasty as its royal family as the governments of these two nations respectively, with the monarchies of Laos and Cambodia also being restored as well. 

. Japan also helps pro-democracy rebels in the Philippines overthrow the government and in its place create a confederation of states, with the Sultans of Mindaou becoming the Emperors of the Philippines and President of the confederation respectively. 

. On the Indian subcontinent, Japan helps restore the Mughal Empire in Pakistan and helps defeat the fascist RSS regime in India, forming a secular republic after the fall of the fascist government. The Mughals claim Jannu and Kashmir.

. After these campaigns, Japan forms the Greater East Asian Co-Prosperity Sphere from the remains of ASEAN to help foster dialogue and communication between the nations of East Asia, as well as to defend Asian nations from outside aggression.

. By the time Izuku Midoriya is born, Japan is a peaceful, prosperous nation and the undisputed ruler of East Asia.