Learn Japanese with these eleven free grammar exercises. They’re suitable for beginners and would be useful revision at higher levels.

101 Personal Pronouns
102 Demonstrative pronouns
103 Prepositions wa, no, o, mo, ga
104 Prepositions he,ni,de,to,kara,made,ka
105 Existential Verbs
106 Godan Verbs
107 Ichidan Verbs
108 Positive, Negative and Interrogative sentence
109 Present and Past of Verbs
110 Irregular Verbs
111 Verb + Tai Desu