The is an electric multiple unit (EMU) train type operated on the Tokyo Metro Tozai Line and Tokyo Metro Chiyoda Line Ayase Branch in Japan by the subway operator Tokyo Metro. Some sets have also been shipped to Indonesia, where they operate on the KRL Commuterline system in Jakarta. A total of 43 ten-car trainsets were built from 1988 to 2004, with a number of variants. Sets 05-125 onward have a redesigned front end, and are called "05N series". Sets to 05-118 have wide doors. A further four sets were due to be built, but the plan was changed to use 07 series trains transferred from the Yurakucho Line, so no further 05 series trains were built. Operations , a total of 34 sets (30 x ten-car sets and 4 x three-car sets) were in operation in Japan. Tozai Line 10-car sets 30 x ten-car sets based at Fukagawa Depot and used on the following lines. Tokyo Metro Tozai Line Tōyō Rapid Line between Nishi-Funabashi Station, Tōyō-Katsutadai Station and Nakano Station. JR Chūō-Sōbu Line between Nakano Station and Mitaka Station. JR Chūō-Sōbu Line between Nishi-Funabashi Station and Tsudanuma Station (only weekday mornings and evenings). Chiyoda Line 3-car sets Four three-car sets based at Ayase Depot for use on Chiyoda Line Kita-Ayase Branch Line services since 2014. Specifications Note: Sets to 139 use 3 pantographs (other pantographs are not used). Batch differences to 05-113 Built 1988 to 1991. From front end glass is slightly extended. 05-114 Built 1991. Wide-door cars. VVVF prototype cars. to 05-118 Built 1992. Wide-door cars. Control system same as sets to . to 05-124 Built 1993 to 1994. Control system is similar to 06 series and 07 series. Window sizes are not uniform. Set 05-124 contains recycled aluminium components. to 05-133 Built 1999 to 2001. Design is completely changed.(05N) Performance is similar to sets 119 to 124. 05–134 to 05-139 Built 2002 to 2003. Control system is similar to 08 series (used on Hanzōmon Line), with increased performance. Uniform window size to 05-143 (13th batch) Built 2004. Control system is similar to sets 134 to 139, but uses pure electric braking. Body fabrication changed to adopt Hitachi A-Train concept. Formations Refurbished sets The refurbished sets are formed as shown below, with four motored "M" cars, and with car 1 at the Nishi-Funabashi end. Each motored car (cars 2, 4, 7, and 9) is fitted with one single-arm