> 
> 開店時は82歳だった林さんが、慣れた手つきで団子を焼いている ([source](https://mainichi.jp/articles/20210920/k00/00m/040/036000c))  
> 
> *Hayashi san, who was 82 years old when she opened the store, makes dumplings with her experienced hands.*
> 
> 
> 

and I was wondering whether to read
開店時【かいてんとき】
or
開店時【かいてんじ】