その際さい

expression, adverb

on that occasion; at that time; in that case

Refers back to a previously mentioned situation or event, often used in formal or written contexts to mean 'when that happens' or 'in doing so'.

• 会かい議ぎの日にっ程ていが決きまりました。その際さい、詳しょう細さいな資し料りょうをお送おくりします。

  The meeting date has been set. On that occasion, we will send you detailed materials.

• パスワードを変へん更こうする場ば合あいは、その際さいに再さいログインが必ひつ要ようです。

  If you change your password, you will need to log in again at that time.