ABOUT:
か as a sentence ender indicates a question. When added to a question or existence word, it adds uncertainty: "some …"
何 | 何か |
誰 | 誰か |
どこ | どこか |
いつ | いつか |
Examples:
■ 何か飲みたいですか? Would you like something to drink?
■ 部屋には、誰かいます。 Someone is in the room.
■ どこかに蚊がいます。 There's a mosquito somewhere.
いつか東京住One day