たしかに

たしかに

Certainly; indeed; surely.

Used to agree with a preceding statement while introducing a contrasting idea.

たしかにその本は面白いけれど、ちょっと長すぎる。

Certainly, that book is interesting, but it's a bit too long.

Used to affirm the clarity of the explanation.

その説明はたしかにわかりやすいね。

The explanation is certainly easy to understand.

Used to emphasize an agreeable and confirmable fact.

たしかに、努力をすれば結果が出ることが多いです。

Indeed, making an effort often leads to results.