Radi is a very famous Murano designer who is mainly linked with AVeM. His work is considered among the best. I don't know about Iwata. I know several Oriental people worked in Murano, so it isn't unusual to see the occasional Eastern name.
The last two vases are Murano glass. The last Oriente looks like it could be AVeM to me (just a guess). The first Oriente, I don't have any idea. They look like really nice vases to me.
I wouldn't mind having four of the five things you showed. I'm not so fond of the Iwata vase, though it does look like good glass.