Luggage storage timeframe for Yamato delivery

I’ll be delivering my luggage via Yamato’s delivery service and I’m seeing conflicting information regarding how long they hold luggage deliveries. It states 3 days maximum and then 7 days. Can someone confirm? I plan to deliver my luggage from my hotel in Kyoto to a delivery office in Tokyo.

Does anybody also know when I should send my luggage’s off? (From Kyoto to Tokyo)

by walkingparadox5