We hope everyone had a good Obon holiday.
Here is our idiom for today, " take over the reins ".
This means to take control.
Example 1
The new CEO took over the reins from day one. He's been a wonderful leader.
Example 2
A. Some day in the next few years, you'll have to take over the reins. Do you think you are ready?
B. Yes, I do. It's a big responsibility, but I think I can do it.