ことにする / ことになる

I decide to ~ / it's decided that ~

'I decided to exercise every day.' vs 'It's been decided I'll be transferred.' Both mean 'decided' — but ことにする is YOUR decision, and ことになる is decided by circumstances.

What you'll learn

• ことにする: I decided to ~ (your own will)
• ことになる: it's been decided (external/natural)
• ことにしている: I make it a rule to ~

JLPT N4 Japanese self-study — interactive practice, instant feedback, completely free.