This study aims to develop a Japanese writing style checker as a tool of a writing tutorial system on the web. This tool will divide input text into words, and show the writing style of each sentence using a writing style list. We have already developed a trial version of this tool, and conducted an experiment using text written by JNS and JFL/JSL learners. The results show that almost every end of a sentence can be determined correctly, but suggest the necessity of modification of the tool to indicate the right style of declinable words in a sentence.
