It would be 繁体字 (Traditional Chinese) mainly used in Taiwan ROC, while People's Republic of China uses 簡体字 (Simplified Chinese) that is simpler than Kanji used in Japan (Shinjitai or Japanese new character forms). In Simplified Chinese, it should be 气 (U+6C14).Also, many kanji are simpllified from a Chinese kanji. For example, ki, energy. It's pronounced Chi in Chinese.. Japanese write it as
気.
In Chinese 氣
It hasn't even been 100 years yet.Japanese write it as
気.
In Chinese 氣