て当然だ・
て当然だ and のも当然だ judge an action, result, or treatment as natural, predictable, or deserved in light of the circumstances or a rule.
How the judgment works
This construction does more than predict what will happen. The speaker evaluates the result against known facts, ordinary expectations, or a rule and says that it follows naturally. With the te-form pattern, the result or treatment is stated compactly; with のも当然だ, an entire statement is packaged as the item being evaluated.
Expected results and deserved consequences
The surrounding circumstance should make the speaker's judgment understandable.
これだけ毎日練習していれば、上達して当然だ。
With this much daily practice, improvement is only to be expected.
Analyzeあれだけ長い会議の後なら、みんなが疲れているのも当然だ。
After such a long meeting, it is only natural that everyone is tired.
Analyze規則を何度も無視すれば、参加を断られて当然だ。
If you repeatedly ignore the rules, being refused participation is only to be expected.
AnalyzeChoosing between the two forms
Choose the te-form pattern when the action or consequence itself is the focus: being criticized, improving, losing trust, and so on. Choose のも当然だ when you want to present a complete fact—such as someone being tired or a place being popular—as naturally understandable.
The link after a noun or na-adjective
この町が観光客に人気なのも当然だ。景色が美しく、交通も便利だからだ。
It is no surprise that this town is popular with tourists: the scenery is beautiful and transportation is convenient.
AnalyzeThe noun-like description uses な before の.
Nearby evaluations
のももっともだ often validates someone's feeling, claim, or reaction as reasonable and can sound more understanding. のも当然だ more directly asserts that the state or consequence naturally follows. Meanwhile, ものだ commonly states a general norm or tendency, whereas the target construction directly evaluates a particular case.
More examples
天候が急に悪化したのだから、便が遅れるのも当然だ。
Since the weather suddenly worsened, it is only natural that the service is delayed.
Analyze初めて一人で舞台に立ったのだから、緊張したのも当然だ。
Since it was the first time performing alone onstage, feeling nervous was only natural.
Analyze約束を守らなければ、信用されなくて当然だ。
If you do not keep your promises, it is only to be expected that people will not trust you.
Analyze長年使っていれば、部品が劣化して当然だ。
After years of use, it is only natural for the parts to deteriorate.
Analyzeこれだけ設備が整っているなら、利用料が高いのも当然だ。
With facilities this extensive, it is understandable that the usage fee is high.
Analyze危険を知りながら無理をすれば、厳しく注意されて当然だ。
If you take an unreasonable risk despite knowing the danger, a stern warning is deserved.
Analyze