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.