と想定して

assuming that; supposing that; based on the assumption that (for planning)

N1

Meaning

assuming that; supposing that; based on the assumption that (for planning)

Formation

普通形 + と想定して

Explanation

と想定して is used when the speaker sets up a certain situation as an assumed scenario and then makes plans, preparations, or decisions based on it.

Unlike と仮定して, which is mainly used for logical analysis or reasoning, と想定して is commonly used when:

  • planning actions

  • preparing countermeasures

  • discussing realistic possibilities

  • designing systems, policies, or responses

The assumption is usually:

  • possible or realistic

  • used as a basis for preparation

  • not purely theoretical

This grammar is frequently used in:

  • disaster planning

  • business strategy

  • simulations

  • manuals and official documents

It sounds formal, objective, and practical.

Usage Notes

✔ Used for planning and preparation
✔ Assumption is often realistic or possible
✔ Common in formal / written contexts
✔ Often followed by 行動・対策・準備・設計

❌ Not emotional
❌ Not casual
❌ Rare in daily conversation