Giving Reasons Lesson 2
Mastering the nuances of expressing causality in Japanese using し, ため, and せい to distinguish between objective facts, subjective reasons, and blame.
When facts aren't enough
In daily life, we often need to explain why something happened. Sometimes it is a simple fact, but other times we want to list multiple reasons, explain a negative outcome, or provide a formal justification.
The Grammar of Reasons
We use different structures depending on whether we are listing multiple reasons, stating a formal cause, or assigning blame.
Tip
Seeing it in action
Here is how these structures look in natural sentences.
雨も降っているし、風も強いから、今日は帰ろう。
It's raining, and the wind is strong, so let's go home today.
台風のため、電車が止まりました。
Due to the typhoon, the trains stopped.
Which sentence correctly uses 'せい' to express a negative outcome?
- ✓ 彼が遅刻したせいで、会議に間に合わなかった。
- 彼が頑張ったせいで、成功した。
せい is for negative outcomes. Success (成功) is positive, so it should not use せい.
Nuance and Register
Choosing the right reason-marker changes how your listener perceives your message.
Formal vs. Informal
ため
Formal/Written, objective cause
悪天候のため
し
Conversational, subjective list
忙しいし
Which form is most appropriate for a formal business report?
- 〜し
- ✓ 〜ため
- 〜せい
ため is the standard choice for formal reports and objective explanations.
Advanced Usage
When using 'ため', remember the connection rules.
Noun connection
Lesson Recap
You have learned how to list reasons with し, express formal causes with ため, and assign blame with せい. Practice these in your daily conversations to sound more natural.