当時とうじ
tōji

Noun
Adverb

1. at that time; in those days

我々われわれはその当時とうじよく放課ほうか野球やきゅうをしたものだった。
warewarewa sono tōji yoku hōkagoni yakyūo shita monodatta.
We would play baseball after school in those days.