Look at your VIN number, if it starts with JT, it is made in Japan. Anything else, it is U.S. built, order accordingly. Or as suggested, enter your VIN and you will get the exact parts for your car listed.
BTW, before you replace the lock, you might consider getting a new key cut by a Toyota dealer. The original key set came with a key code, if you don't have that, you can get the code from the passengers door lock. Unfortunately, that means removing the door panel and lock to get the code. But if you give that code (and proof of ownership depending on the dealer) they will be able to cut you a new key.
Another option is to remove the ignition lock and clean it. I found that PB blaster cleans it up really well, I then lubricated it with synthetic grease. After I did this, the lock no longer sticks, and they key does not fall out of the ignition anymore when the car is running. I did dismantle the lock to clean it (requires drilling out a pin and two nubs), but you don't have to do this, spraying it with lube will still help. I don't know if doing this in the car is a good idea though, quite a lot of excess oil comes out of the lock along with all the old grease, you don't really want that oozing everywhere in the steering column.