としよう

let's ...; let's suppose

→ と

phrase Rare #32,159

let's ...; let's suppose After a verb, often expresses a decision or suggestion to do that action. After a statement, it can introduce a supposition, as in “let's suppose that ...”.

JA: そろそろ帰るとしよう。

EN: Let's head home soon.

クマ君に頼むとしよう

Let's ask Kuma-kun to do it.

— パディントン２ (2017)

満足するとしよう

Let's say I'm satisfied.

— ほんとうのピノッキオ (2019)

聞くとしよう

Let's hear it.

— 28年後... 白骨の神殿 (2026)

帰るとしよう

Let's head home.

— どん底作家の人生に幸あれ! (2019)

君の場合は例外としよう。

In your case, let's make an exception.

難しい講義を聞いたとしよう。

Suppose you listened to a difficult lecture.