世界で初めてのって英語でなんて言うの？

if something is the very first in existence, then you could say: "This is a world first." You could also say 'ground-breaking' if it's something which is not a duplicatioin of another thing. If we are talking about something that is not unique but there is something special about part of it, or it's presentation, you could say: "It's the first in the world of its type." Ground-breaking - innovative; pioneering. "Groundbreaking research into fertility problems"

You could describe something as "the world's first amusement park." You could also describe it as "The original amusement park" as original means the first or earliest example of. You could also say "The first ever amusement park" to explain it is the first amusement park to exist.

▪ This is the very 1st amusement park that was built int he entire world. "entire" means the whole world, no part left out. This means that in the world this was the 1st amusement park that was built. ▪ This is the worlds 1st amusement park. This is a direct way of saying that there was no other amusement park built before this one which means this is the 1st amusement park ever.

1. This amusement park is the first of its kind in the world. この遊園地は、世界でも初めての遊園地です。 This statement means that there is no other amusement park like this in the world. 2. This is the world's first amusement park. これは世界で初めてのアミューズメントパークです。 The world's first amusement park means that this amusement park comes before all others. Before this amusement park, there was no other amusement park.

"the first of its kind" - this is used to describe anything that is generally the first type of something when something is the first, you can also say that it is "monumental" If it is the first in the world, you can say "the world's first" or if it is for example Tokyo's first, you can say "Tokyo's first amusement park." Often, you can remove the first in the last example, and say "Tokyo's amusement park." Since, it is the first amusement park, it is the only one that gets this title.

It really depends on what message you want to relay. If there has been no other amusement park before this one, then, definitely, this is 'the world's first amusement park'. However, if there have been other amusement parks, but, this one stands out, that no other amusement park matches it, then, 'it's the world's first amusement park of it's kind'. So, you may say to someone: It's the world's first amusement park. (only if there has been no other amusement park before this one) or It's by far the world's first amusement park of it's kind. (only if it is unique and no other amusement park in the world matches it)