Boogie Train '03 (ブギートレイン’03) is Fujimoto Miki's fifth single. It was released on February 5, 2003 and sold 50,737 copies overall. It peaked at number eight on the Oricon charts and was track #1 on Fujimoto's album MIKI ①. The single V peaked at #1 on the Oricon weekly charts and sold 18,757 copies. The promotional video for "Boogie Train '03" features Hello! Project Kids: Umeda Erika, Tokunaga Chinami, Tsugunaga Momoko, and Sudo Maasa. It was also the last song she released before joining as the 6th generation member of Morning Musume and the first pressing of it came in a limited edition tin packaging.