〜としたら

if / supposing that

N2conditionals

〜としたら is a conditional pattern meaning if / supposing that. Japanese has four main conditional forms (ば, たら, なら, と), each with distinct nuances. Understanding when to use each one is key to expressing hypothetical situations, cause-and-effect, and conditions naturally.

This is an advanced pattern found primarily in formal writing, news articles, business Japanese, and academic texts.

Structure

[Clause plain] + としたら / とすれば / とすると

When to Use#

  • When considering a hypothetical scenario
  • When imagining a situation and exploring its consequences

When NOT to Use#

  • In very casual speech — a simpler expression is usually more natural

Example Sentences#

  • その状況にあるとしたら、私も傷つくと思います。 — If I were in that situation, I would feel hurt too.
  • この差別が続くとしたら、社会の結束を損ないます。 — If this discrimination continues, it will harm social cohesion.
  • 若者が投票に行かないとしたら、社会は変わりません。 — If young people don't vote, society won't change.

Practice#

Try reading these sentences aloud, then check the translation and vocabulary:

N2psychology

If I were in that situation, I would feel hurt too.

Neutral

その状況(じょうきょう)にあるとしたら、(わたし)(きず)つくと(おも)います。

Casual

その状況(じょうきょう)にあるとしたら、(わたし)(きず)つくと(おも)う。

Vocabulary
状況situation, circumstances傷つくto be hurt, to feel hurt思うto think
Grammar
〜としたらif, assuming that
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N2commentary

If this discrimination continues, it will harm social cohesion.

Neutral

この差別(さべつ)(つづ)くとしたら、社会(しゃかい)結束(けっそく)(そこ)ないます。

Casual

この差別(さべつ)(つづ)くとしたら、社会(しゃかい)結束(けっそく)(そこ)なう。

Vocabulary
差別discrimination続くto continue結束unity, cohesion損なうto harm, to damage
Grammar
〜としたらif; assuming that
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Common Mistakes#

  1. Using 〜としたら in casual conversation — This pattern sounds overly formal or literary in casual speech. Reserve it for formal writing, presentations, or situations that call for elevated language.
  2. Direct translation from English — The concept expressed by 〜としたら may not map one-to-one with its English translation. Focus on understanding the Japanese usage through example sentences rather than relying on the English gloss.

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