とすれば

Common wordFreq.FrequencyTop 100,000

Meanings

Used to present a logical conclusion or hypothetical result based on a preceding statement. Similar to とすると, but slightly more formal or written.

Usage patterns

〈事こと〉だとすればif it is (the case) that ...
彼かれの話はなしが本ほん当とうだとすれば、大たい変へんなことになる。
If what he says is true, this will be a serious problem.
そうだとすればif that is so
そうだとすれば、計けい画かくを変かえる必ひつ要ようがある。
If that is so, we need to change the plan.

Grammar

としたら・とすれば・とするとsupposing that; if we assumeN3

Related words

とすると
とすると is more common in casual spoken Japanese, while とすれば has a slightly more formal, written feel when drawing a logical conclusion.
としたら
としたら is the most colloquial of the three, often used in everyday hypothetical talk, whereas とすれば sounds a bit more formal or logical.
ならN1
ならば is a more literary, general conditional marker, while とすれば specifically follows a stated premise to draw a conclusion from it.
すれば
とすれば marks an explicit supposition ('if we assume that'), whereas すれば more loosely links a condition to its result.

Etymology

Derived from the conditional form of the quotative particle と plus the verb する. The exact historical development is uncertain, but it functions as a fixed conjunction meaning 'if so' or 'then'.