Yamato Courier - Hat with their logo - where?

Hello
I�fd love to get the Yamato Courier Hat, especially the one with mesh sides they are using now! Love their logo! other stuff than hat would do. Any tips where to get it? I�fm in Kyoto now, but will be in Osaka and Tokyo still

Hats may not be sold, but you can buy original goods at this museum. (located in Tokyo)
https://www.yamato-hd.co.jp/museum/en/

For example, there seems to be goods like this.
https://twitter.com/yamato_19191129/status/1334694879205593089

Hats are part of their uniform that proves that the person who comes to your door is a trusted Yamato personnel. A non-employer wouldn't and shouldn't be able to obtain them. But as suggested, there are a lot of nice Yamato merch you can get hold of.