Grammar · N4
Japanese conditionals: と・たら・ば・なら
Four common conditional patterns overlap, but each frames the condition differently.
In short
と is strong for automatic/natural results and habitual sequences. たら is flexible for “if/when X happens, then…”. ば foregrounds the condition-result relation. なら responds to or assumes a stated situation: “if that is the case…”.
How it works
There is no one-to-one English rule. The speaker’s stance and whether the result is controlled, hypothetical, general or context-given matter.
Useful contrast
Start by learning typical use cases, then compare real examples rather than trying to force every English “if” into one form.
Examples
駅に着いたら、連絡してください。
When you arrive at the station, please contact me.
春になると、暖かくなります。
When spring comes, it gets warm.
Common pitfall
Commands and intentions can be awkward after と because と strongly suggests an automatic result.