Insurance is always a hot topic of conversation, especially when it comes to Japanese Imports.
As a general rule of thumb, there should be no real "premiums" for insuring the Elgrand over any other vehicle in it's class. The problem you may find is that insurance databases are not always as up to date as they should be when it comes to imports.
Typically, you want to be going for a Japanese Import Specialist insurer. These are usually the best in terms of keeping up to date with import vehicles on their database. They will also, USUALLY, be the most competitive.
Do NOT bother wasting time with comparison sites for your Elgrand... they will throw up ridiculous quotes and just be a waste of your time. Go to insurance companies directly.
My general advice to anyone who asks is to follow the below:
Contact Adrian Flux. Give them all your details and get a quote - I would not recommend taking a policy out with Flux due to the level of complaints I have seen/heard from people in the event of a claim. But, this is just hearsay really, so it's up to you if you choose to insure with them.
Ring Sky Insurance, give them all your details and the quote you got from Flux, they will, most of the time, beat it.
Ring GreenLight Insurance (our Insurance partner), give them your details, give them your cheapest quote, and then tell them you are a member of ElgrandOC to get your 15% discount. If they cannot beat the quote from Sky, go with them.
There are a lot of members who are more than happy, or have had their best quotes from some of the normal, big name insurance companies such as Direct Line, Admiral, Aviva etc. So if you really want to get a comparison across the board, ring some known insurance companies too and see if they can be competitive or not. But I would advise you ring the three Jap Import Specialist insurers listed above first, and then go to the big known insurance companies.
There is a whole different routine you will have to take to insure a FRESH IMPORT that has NOT BEEN REGISTERED. You need to insure on the Chassis number etc, and things are more complicated overall... so if you are looking at insuring an Elgrand off the boat to get in home for MOT etc, then please check in the "Import Experiences" forum section to see what others have done.
Hope this helps.