You do not start out with the first Rod, you must earn it.
Oprin is not a magic spell that you may cast any time you like. It must be purchased in packs of five like an item.
New levels of experience are reached much more slowly. The only way to level up is by heading down into Japanese version-only caves and talking to a woman there after accumulating enough experience. There's one such cave in each world.
Because Oprin is an item, you will begin the game with 0 maximum MP, and you will not earn any until Level 2.
At Level 2, you learn Bolttor 1, Pampoo, Defenee, and another spell that makes invulnerable enemies vulnerable to your attacks.
The worlds in each chapter are substantially bigger. Map making is especially recommended in order to prevent getting lost.
There are a lot more underground dungeons to find and explore.
Changarl will attack you on the screen before the bridge leading to Horen in the past. The fight is extremely difficult if you don't possess the rod (which conveniently is in Horen). If you do have one, it's a good way to build up money, since he drops a yen bag worth 20 coins every time you kill him.
There's an MP star at the north end of the region of Chapter 1; no MP star exists in the first world of the North American version.
You may be assaulted by invulnerable thieves in the past; you can't harm them with your rod or sword unless you cast the spell which makes them vulnerable
You change your items/magic on the fly without going to the subscreen. Pressing to pause the game and select your A/B button options with the control pad.
Some of the field enemies are drawn differently; the most notable are the monsters that pop out of the water to shoot you.
The University charges 100 Rupias for admission, and 50-80 Rupias for the courses. Two of the three courses involve formations, and the third teaches you about Monecom.
The prologue of the game appears when you turn on the game as opposed to when you start a new game.
There is no animation of your hero being sucked into a time door when you start the game in the Japanese version. In fact, there are no time doors at all; when you do travel through time, you are sucked into the void.
North Cape is still in Chapter 1, and Horen is still submerged in the Present.
Faruk is not located in the same place in the past; his house contains a generic woman.