Purchasing tickets for Yokohama Museums

Where can I purchase tickets to both museums in Yokohama? I head that tickets for the Ramen museum can only be purchased at Lawsons? Can I purchase tickets at the museum instead?

By "both museums" I'm assuming you mean the Ramen Museum and the Cup Noodle Museum? There are a number of museums in Yokohama, so you should make your question clearer about which ones you are asking about in the future.

You can purchase the tickets at each museum when you go; I'm not sure where you heard about the Lawson information. Maybe you're thinking of the Ghibli Museum instead?

It does look like you can reserve times for the workshops at the Cup Noodle Museum at Lawson, but it isn't required. Unless you are worried because it is a national holiday or something, I wouldn't bother.

Thanks for the information and sorry for the poorly worded question.