On its neck plate (or stamped into the guitar, or on the truss rod cover) it will say, "STEEL REINFORCED NECK".
That's a dead giveaway that you've got one of "Uncle Matt's" guitars.
That in itself shouldn't cause much confusion, because we know (from Hoshino) that "if it doesn't say Ibanez" it's not an Ibanez.
However, Fujigen Gakki, the manufacturer of Ibanez-branded guitars would provide stock, no-name images to Hoshino and other distributors for use in their catalogs. Fujigen only had to take one picture of a guitar instead of one with each different brand on it.
Loosely defined (and coming into more popular use on sites such as e Bay and Craigslist) a "lawsuit" guitar is ANY old guitar made outside of the USA that is a copy of a popular US-made guitar.
In this sense, any MIJ (or made in Korea, China, wherever) guitar that looks like a Fender strat or tele; or a Gibson Les Paul, SG, ES-335; or a Martin acoustic; or a Guild or Rickenbakker; can be labeled as a "lawsuit" model.
During the 1970s, Hoshino used a single Japanese manufacturer for its electric guitar production. Currently Fujigen makes its own line of self-branded instruments, but in the 1960s up through the present, it also contracts with a number of other companies to produce instruments with other brand names on them.
Beginning in the late 1960s, Hoshino began contracting with Fujigen to produce Ibanez-branded instruments.
Another big point of contention is the subject of no-name (unbranded) guitars.
As I said above, Fujigen and the other manufacturers produced guitars with no logos at all for sale around the world.
Since Fujigen is one of the major Japanese guitar manufacturers, people assume that any guitar they've made was "made at the Ibanez factory" or was "made for Ibanez under a different brand". To add to the confusion, there were other large guitar manufacturers in Japan at the time (Matsumoku was one and Kasuga was another) and people have made the leap to say that literally ANY guitar stamped "MADE IN JAPAN" must have been produced at the Ibanez factory or for Ibanez.
Some brands known to have come out of the Matsumoku factory: Here's a quick way to tell if you have a Matsumoku factory guitar (whether branded or not).
Let me get right to the point: If a guitar does not have a valid "Ibanez" logo on its headstock, then it's NOT an Ibanez guitar.