If you're looking for a club plot for 25 or so cars at this year's JAE then finding space in the area called KANETSU is going to be difficult as it's sold out.
Yes, KANETSU is sold out and all the plots full. JAE operates a first-come-first-served policy with bookings so, if you haven't booked yet, you'd better do it quickly! Plenty of other areas are selling out too so KANETSU won't be the last to be sold out.
If you're in doubt of what to book then both DAIKOKU and UMIHOTARU are about 12 cars plus all your tents etc. per square. So, more than 12 cars you'll need to order more than one of DAIKOKU or UMIHOTARU
...and if you want to know how to book follow this link