The number of participants in the 4th Toho Dispute Strike was about 180 members at the Toho branch of the Japan Film Theater Labor Union (Nichiei) and 140 at the Hibiki studio, which is extremely compared to the 3rd Dispute. It lasted from May 17, 1950 to December 29, 1950, although it is not widely known because of its small number. Even after the end of the third strike in 1948, Toho continued to increase its popularity due to incongruity with internal factions and Shintoho, and its debt and other debts at the end of January 1950 were about ¥1.3 billion. It amounted to ¥150 million and there was an urgent need for new personnel reductions.