You can migrate one or more Yammer networks with their own email domains ("subsidiary" networks) to a larger Yammer Enterprise network ("parent" network).
The subsidiary networks can be either Yammer Basic or Yammer Enterprise, but the parent network must be enterprise activated.
I've recently started another website at another domain, and I want to also use Google Apps (again, Standard Edition) to provide the email for this new domain.
If AD is implemented in Japan, there should be a problem.
Recently, we at Biz Budding have had quite a few discussions about brand strategy, website domains, and SEO — directly resulting from customers who asked “Should I combine my websites?
Do I need to go through the entire registration process again and create a whole new Google Apps account for the new domain, or can/should I add it on to my existing services? However, there are some things I think I should say about that approach.
For completely unrelated sites, it's probably best to sign up for completely unrelated Google Apps accounts.