Translation guide
The English word "understandable" can be used in two main ways: to describe something that is easy to comprehend, or to express that a feeling or reaction is reasonable. This guide covers natural Japanese expressions for both meanings.
Describing speech, writing, explanations, or concepts that are clear and easy to understand.
The most common and natural way to say something is easy to understand. Used for explanations, instructions, speech, etc.
His explanation is very easy to understand.
This book is written in an easy-to-understand way.
Literally 'able to understand'. More formal and often used in written contexts or when discussing comprehension ability.
His theory is understandable even to me.
Means 'clear and lucid'. Used for explanations or arguments that are logically clear and easy to follow. Somewhat formal.
His lecture is clear and easy to understand.
Saying that someone's emotion, reaction, or behavior is understandable given the circumstances.
A common phrase meaning 'it's no wonder' or 'it's understandable'. Used to show empathy when someone reacts in a certain way.
It's understandable that he got angry.
If you're tired, it's understandable.
Means 'it's natural' or 'it's only to be expected'. Stronger than 無理もない, implying the reaction is completely justified.
Also used for feelings: 'I can understand (why someone feels that way)'. Slightly more formal than 無理もない.
I can understand how you feel.
Means 'reasonable' or 'justifiable'. Often used to agree with someone's opinion or reaction.
His opinion is understandable/reasonable.
分かりやすい focuses on the clarity of the presentation (easy to follow), while 理解できる focuses on the listener's ability to comprehend the content. Use 分かりやすい for well-structured explanations; use 理解できる when you personally grasp the meaning.
This map is easy to understand (clear).
I can understand this concept.
The direct translation '理解可能な' (rikai kanō na) exists but is rarely used in natural conversation. It sounds technical or stiff. Stick to the options above.
It's understandable that she is sad. (It's only natural.)