Place to keep packages in Japan

Hi, I have a friend visiting Japan in two weeks, and I was looking to order clothes online and have them pick it up since the company does not do international shipping. I was wondering if there were any places in Japan to send a parcel for keeping to- just as for amazon you can send it to a local convenience store for 10 days. I'm very unaware of things that go in postal services, and trying to find an answer in japanese makes things even tougher. If I wanted to have it sent to the post office, would that work? And on their website, there isn't a simple 'ship to store' option, so would it work to just enter a store address?

You can send it to the hotel they are staying at, if you arrange for delivery while they are there (i.e., not too early, and definitely not after they depart). Make sure to address it as "hotel guest: Jane Doe", otherwise the hotel may not accept it.

Send to post offices: https://www.post.japanpost.jp/service/sisho/

DO NOT just write the address of a post office or other store; if you do the delivery WILL be rejected and sent back to the sender.

I meant "sending to post offices", not necessarily that you should do it; sending to the hotel would probably work too (although it's always best to ask them in advance).

I've suggested that, but he'd prefer if there were a different place other than his hotel where he could pick it up.

Why can your friend not collect the packages from your residence?

By the way, of course sending to post offices only works if the package is sent by post. If it is sent with Yamato, they have a similar system where you can send to a service center, and Sagawa probably has one as well.