1830m(Sen Happyaku Sanjū Mētoru, "One Thousand Eight Hundred Thirty Meters") is the 4th album by the Japanese female idol group AKB48. It is a double-album release and was released in Japan on August 15, 2012 by King Records. It sold 1,051,000 copies.
The title "1830m" implies the distance from AKB48 Theater in Akihabara to Tokyo Dome, an indoor baseball stadium with over-50,000 capacity where AKB48 had performed for the first time, for 3 days from August 24 to 26, 2012. It is released in two editions, a regular edition coming in a special box with a 48-page photobook, a bonus DVD and a random photo, while the theater edition comes with 14 alternate covers, a handshake event ticket and a photo of an AKB48/SKE48/NMB48/HKT48 member chosen at random. This is also the last album to feature Team A member Atsuko Maeda.
CD1 contains the following first-time studio recordings, which have all been performed on team stages: "First Rabbit", "Miniskirt no Yōsei", "Lemon no Toshigoro", "Ren'ai Sōsenkyo", "Romance Kakurenbo" and B-sides which only appeared on theater editions of their singles which are "Jung ya Freud no Baai" (from "Give Me Five!"), "Hashire! Penguin" (from "Ue kara Mariko"), "Yasai Uranai" (from "Flying Get"), Anti (from "Everyday, Katyusha"), "Ōgon Center" (from "Sakura no Ki ni Narō") and "Tsubomitachi" (from "Kaze wa Fuiteiru").