Tokyo 8th district was a constituency of the House of Representatives in the Diet of Japan (national legislature).
It was created in a 1964 redistricting form areas that had previously formed part of the 1st district: It consisted of Eastern Tokyo's Chūō, Bunkyō and Taitō special wards, central parts of the former city of Tokyo.
In a reapportionment for the 1993 election the number of representatives for Tokyo 8th district was reduced from three to two.
Exceptions were the elections of 1979 when the conservative vote was split between three LDP candidates (Takashi Fukaya, Nakasone faction, Kunio Hatoyama, Tanaka faction and Hisanari Yamada, without faction) and 1993 when Kunio Hatoyama had left the LDP to side with the opposition demanding political reform from the LDP.
Hatoyama joined Takeo Nishioka's Kaikaku no Kai ("reform assembly") in 1994 that eventually became part of the Liberal Reform League (Jiyū Kaikaku Rengō) later that year.