Postposition

From UniLang Wiki

A postposition is a type of adposition occuring at the end of a word. It modifies a noun phrase to show relation within a clause. For example, Japaneses use postpositions to identify subject and object in the sentence "I speak German" as follows:

    わたしは            ドイツ語を          話します。

  watashi-wa          doitsugo-wo       hanashimasu.

I-(subj marker)   German-(obj marker)      speak.

Here "wa" and "wo" both perform as grammatical postpositions.