Gotō Shinpei, Mayor of Tokyo (1917-1918); architect of the Prefectural Reform of 1918
Gotō would later serve as the First Governor of Tokyo (1918-1924).
十三. 県改革
13. Prefecture Reforms
One of the first standing actions of the new Shōwa era, was the Prefectural Reform of 1918. While Japan's prefectural system had largely been unchanged since the later Meiji era, there were some reforms that many thought necessary to facilitate a stronger Imperial system. This came in the form of manipulation of municipal administrations, and the consolidation of the colonial prefectures into actual administrative provinces that would lead to the ability to include them into the Imperial state.
The reform had a few focuses:
Tokyo City, as it existed, was abolished, and was merged with the Tokyo Prefecture. The newly merged prefecture was replaced by a special prefecture of itself, covering the former municipality of Tokyo, and extending into the nearby countryside as a 'framework' for expanding the capital city; called 'Tokyo Metropolis'. Within the prefecture, there would exist 23 special wards (特別区; tokubetsu-ku), which were the core of the original city, such as Nerima, Akihabara, Minato, Shibuya, et al; and the 'outer wards' which consisted of smaller villages and communities close enough to Tokyo to make up a working population in the city, but far enough away to not warrant their inclusion in the special wards. The establishment of the Tokyo Metropolitan Government (東京都庁; Tōkyōto-chō) marked an extension of the powers of the constitutional democracy, as it was a fully democratic government that would run the Tokyo Prefecture.
Osaka, as well, was restructured in a similar way, with the original core city consolidated into tokubetsu-ku, and the outlying villages consolidated into smaller wards and townships, with one central Metropolitan government serving as the head of it. The concept was to ensure the proper governance of the major cities in Japan. This opened the door of interest to extend similar policies to smaller cities in Korea and Taiwan, as well as the Kwantung Leased Territory--all of which were of interest to expand the prefecture power of the democratic state against militarism.
The colonial prefectures, in Korea and Formosa, were overhauled to strengthen the ability to effectively administrate. While the lessening of Japanese authoritarianism in Korea and Formosa had improved relations between their colonies and the master, the prefecture reforms were an attempt to create proper administrative zones so that 'uplifting' and 'civilizing' could be done in a proper manner without the need for archaic bureaucratic measures; prior to the reforms, Korea was governed by the thirteen provinces of the Korean Empire, as it had existed before the annexation of 1910. The new reforms redrew the borders, and, after the fact, there were 20 provinces in Korea, allowing for closer administration of the outremer.
The 1918 reforms are considered as to having a net positive effect in the governance of the Japanese Empire, and helped strengthen the early Shōwa era.