CJK characters
Chinese is written almost exclusively in Chinese characters. It requires over 3,000 characters for general literacy, but up to 40,000 characters for reasonably complete coverage. Japanese uses fewer characters — general literacy in Japanese can be expected with 1,945 characters. The use of Chinese characters in Korea is becoming increasingly rare, although idiosyncratic use of Chinese characters in proper names requires knowledge (and therefore availability) of many more characters. However, even today, students in South Korea are taught 1,800 characters.
Written Hokkien
Writing Hokkien using Chinese characters is a common method of writing in Taiwanese literature. However, there are various problems relating to the use of Chinese characters to write vernacular Hokkien, and in many cases Chinese characters are used alongside other scripts, such as bopomofo or POJ. The problem with using only Chinese characters to write Min Nan is that there are many morphemes (estimated to be around 15 percent of running text) which are not definitively associated with a particular character. Various strategies have been developed to deal with the issue, including researching and reviving the etymologically correct Chinese character from ancient Chinese texts, and classical Chinese, creating new characters, allocating Chinese characters used in written Mandarin with similar meanings, but dissimilar etymology, to represent the missing characters, or using romanization for the "missing 15%".