... approaches, and showed that character-basedapproaches had higher accuracy than word-basedapproaches, and that conducting word segmentation and POS tagging all at once performed better thanconducting ... Ltd.2−5−7 Honmachi, Chuo-kuOsaka 541−0053, Japannakagawa378@oki.comKiyotaka UchimotoNational Institute of Information and Communications Technology3−5 Hikaridai, Seika-cho, Soraku-gunKyoto 619−0289, ... such as syntactic parsing.English POS tagging can be handled as a sequentiallabeling problem, and has been extensively studied.However, in Chinese and Japanese, words are notseparated by spaces,...