Pronunciation is a majorly difficult thing for most native English speakers. I know people look at Japanese vowels and consonants and think “wow, only 5 vowels and a limited set of consonants and combinations, this is super easy!” And I guess it is easier than… Russian, Hungarian or French. But that doesn’t mean it’s easy.
But that’s mostly because they’re thinking of the “a” sound in English and the “o” sound, and so on. In reality, Japanese vowels are so radically different from English vowels, the vast majority of learners are going to completely butcher their pronunciation. You have to learn how to simplify all of them to their real sounds, because English vowels are usually rather complex, while Japanese are more similar to Spanish vowels. You also have to get rid of the plosives, which are also a dead giveaway when someone is a native English speaker.
As for what makes Japanese easier than others… hmm… well, not a lot, actually. I guess tenses and verb conjugations are considerably simpler than most Romance languages, for example. There are no gendered nouns but you have Kanji which is far more time consuming to memorise, and grammar structure and logic is usually completely different from English, and you’ll have to learn how to think differently to get your head around many concepts. This happens with most languages but even more so with Japanese.
So uh… the only thing that I think makes Japanese easier is that it’s arguably one of the most studied, documented and resource-rich languages to learn. There are millions of resources focusing on efficient and thorough study methodologies, as well as a lot of very popular media, books, TV shows, you name it. Cultural relevance is, in my opinion, Japanese’s biggest advantage, which is only rivalled by Spanish in the United States, or perhaps (I honestly have no clue but I’m guessing) French in the UK.