A shared origin
Japanese kanji and Chinese characters (汉字 in simplified Chinese, 漢字 in traditional Chinese) share a common ancestor — the Chinese writing system that Japan imported between roughly the 4th and 9th centuries CE. At the time of import, many characters were used with meanings and forms very close to their Chinese originals. A literate Chinese person from the Tang dynasty could have read a Japanese court document with reasonable comprehension.
Over 1,400 years, the two writing systems have diverged in form, meaning, and usage — but the shared foundation remains visible. A modern Chinese reader can often guess the meaning of a Japanese text from the kanji alone, even without knowing Japanese pronunciation.
Simplification: three parallel systems
There are now effectively three parallel systems of Chinese characters: Traditional Chinese (used in Taiwan, Hong Kong, and classical texts), Simplified Chinese (used in mainland China, introduced in the 1950s-60s), and Japanese Kanji (simplified independently by Japan in the 1940s-50s). The Japanese simplifications were different from China's simplifications — so the same character often exists in three different forms.
Some characters are identical across all three systems: 山 (mountain), 水 (water), 人 (person). Others diverged significantly: "dragon" is 龍 in traditional Chinese and classical Japanese, 竜 in simplified Japanese, and 龙 in simplified Chinese — three distinct forms of the same concept.
Different meanings, same character
Many kanji have drifted in meaning between Japanese and Chinese. 娘 means daughter in Japanese but "young woman" in Chinese. 手紙 means letter (written correspondence) in Japanese but "toilet paper" in Chinese. 丈夫 means sturdy/robust in Japanese but "husband" in Chinese. These false friends can cause comic misunderstandings between speakers of the two languages.
Explore the writing system
Learn how kanji, hiragana, and katakana work together.