anime." Few complete animations made during the beginnings of Japanese animation have survived. The reasons vary, but many are of commercial nature. After the clips had been run, reels (being property of the cinemas) were sold to smaller cinemas in the country and then disassembled and sold as strips or single frames. The earliest anime that was produced in Japan to have survived into the modern day, The Dull Sword, was released on June 30, 1917, but there it is disputed which title was the first to get that honour. It has been confirmed that was made sometime during February 1917. At least two unconfirmed titles were reported to have been made the previous month. The first anime short-films were made by three leading figures in the industry. Ōten Shimokawa was a political caricaturist and cartoonist who worked for the magazine Tokyo Puck. He was hired by Tenkatsu to do an animation for them. Due to medical reasons, he was only able to do five movies, including Imokawa Mukuzo Genkanban no Maki (1917), before he returned to his previous work as a cartoonist. Another prominent animator in this period was Jun'ichi Kōuchi. He was a caricaturist and painter, who also had studied watercolour painting. In 1912, he also entered the cartoonist sector and was hired for an animation by Kobayashi Shokai later in 1916. He is viewed as the most technically advanced Japanese animator of the 1910s. His works include around 15 movies. The third was Seitaro Kitayama, an early animator who made animations on his own and was not hired by larger corporations. He eventually founded his own animation studio, the Kitayama Eiga Seisakujo, which was later closed due to lack of commercial success. He utilized the chalkboard technique, and later paper animation, with and without pre-printed backgrounds. However, the works of these pioneers were destroyed after the Great Kanto Earthquake of 1923. The works of these two latter pioneers include Namakura Gatana ("An Obtuse Sword", 1917) and a 1918 film Urashima Tarō which were believed to have been discovered together at an antique market in 2007. However, this Urashima Tarō was later proved to most likely be a different film of the same story than the 1918 one by Kitayama, which, as of October 2017, remains undiscovered. Pre-war productions (1923–1939) Yasuji Murata, Hakuzan Kimura, Sanae Yamamoto and Noburō Ōfuji were students of Kitayama Seitaro and worked at his