Oska Writing is a completely new Chinese character learning app developed for children (especially learning disabilities) who have difficulty learning Chinese characters with general Chinese character drills. In addition to all the common kanji (1026 characters learned in elementary school, 1110 kanji learned in junior high school), hiragana and katakana are also included. Children who are not good at learning Chinese characters have some characteristic tendencies and can be broadly classified into the following five types. 1) I am not good at eye movements 2) I am not good at remembering visual forms 3) I'm not good at finding a unit in Chinese characters 4) I'm not good at remembering the order visually 5) Tendency to be clumsy It may apply to one of the trends, but in general it often has multiple trends at the same time. The following Kanji practice method was devised as a Kanji practice method to deal with each tendency. [Simultaneous Chinese character learning method] The basis of learning Chinese characters is to trace them. This is a method that is also used in general Chinese character learning apps, but in this app, each stroke is presented in a different color. This is a way to get attention to the details of Chinese characters. (Colors can be customized to your liking) [Sequential Kanji learning method] In this learning method, the next image to be traced is always displayed, and the Chinese characters are written in order. [1 to 3 stroke reduction] When tracing Chinese characters, it is a learning method that allows you to write in your own memory without displaying the sample of the last 1 to 3 strokes. By repeatedly learning Chinese characters in this way, you will be sure to settle in your memory. [Blank book] The "empty writing" function, in which you write your own Chinese characters on a white screen, is incorporated into the process of learning Chinese characters. This is a practice method required to learn Chinese characters through the memory of hand movements. On the blank writing screen, you can switch between the mode in which the written characters are displayed immediately and the mode in which the characters are not displayed on the screen until you finish writing one character. With this app, you can combine and learn these learning methods according to your child's characteristics. In addition, it has the following features: ● Management of learning history For each Chinese character, you can save the number of times you practiced, self-evaluation (5 levels), and instructor evaluation (5 levels). ● Includes readings of Chinese characters, idioms, and example sentences Contains readings, idioms, and example sentences of all Chinese characters. It also supports kanji search and sorting by reading. ● Flexible customization function How to trace Chinese characters: Free (can be traced anywhere on the screen) / Stencil (trace only the displayed Chinese character image) Brush touch: Flat (displayed in Gothic font) / Brush (displayed in brush font) Character darkness: You can change the color darkness of the Chinese characters displayed as a sample. Image color coding: You can change the color of each image during simultaneous learning. Cross display: Shows or hides the grid of the background of Chinese characters. You can also adjust the darkness to be displayed. This app was developed based on the research results of Shoji Onishi, Department of Disability Science, Graduate School of Comprehensive Human Sciences, University of Tsukuba / Doctoral Program.