This paper uses text from a chat dialogue text with spoken language characteristics appearing in written language, as a material, and on how was the femininity and masculinity in linguistic form perceived, a survey for Japanese native speakers has been conducted. In this research, we set the sentence-ending particle as an analysis target and tried approaches from the morphological aspect as to how these characteristics influence gender discrimination. From the result of the analysis, femininity has been highly expressed through expressions such as [yo, ne, yone, kamo, kana, mon] while masculinity has often been expressed through words like [na, ka]. These finite particles were found to be the judging element of femininity and masculinity depending on the form connected with the character and the nonverbal element of the word prefixed to the final particle rather than the semantic usage of each final particle itself. The element of femininity and masculinity that is presumed from the morphological aspect causes the feminine image to be expressed in a decorative form in which the emotion of the writer is conveyed through a rich emotional expression and utterance to the reader.In contrast, it became clear that masculine image is mostly expressed through the weaker emotional expressions that convey hardship or frustration.