The Japanese particle no is not strictly a genitive marker in the western sense of the word. As tokumei pointed out, it is sometimes a sentence ending. Other uses are:

- Its use in sentences is also extended to qualification, i.e., imouto no Tomoko, my sister Tomoko.
- As a part of a demonstrative sentence ending "no desu", kyou wa osoi no desu, today (I) was late (you see).
- To indicate an object that possesses a particular attribute, akai no, the red one.