japanese is not hard, kanji isnt hard ethier , there are 2,000 kanji in general use , but if u know just the first 1006 u can read about 70-90% of a news paper , and i heard most mangas and video games dont use any of the other 1000, and if they do they most likely put furigana(they tell the u read of the kanji), i think korean is the hardest , many people have not heard korean to actullay understand its complexity , korean grammar is really
really different from english , and its is also very vague in speech. Korean Hangul is also sometimes very annoying, and many pronunciations are much harder than just than chinese , were you can easily research the tone, and once u get used to it , its easy, but in korean many consonant and vowel clusters are pronounced different than most indo european languages. Also chineese characters arent like super bad , first to be able to read a newspaper u need to know about 4,400, to much over , and (im not sure on this) most likeley just like japanese , u only need to know about 3k to read 70% of it , and most of it you could probably infer from context.
Japanese is probably the easiest language of the asian languages, japanese conjugation rules are really easy, with only 2 irregular verbs, almost all conjugations can be even further conjugated becuase they all end the same
e.g. all japanese verbs end in u so for the verb "taberu" u drop ru and add the conjugation for desire"tabe+tai" i want to eat, then u drop the i and u put kunai and u get "tabe+ta+kunai" i dont want to eat m consequently, this is the same for adjectives , kawaii means pretty , u drop one i and u add kunai and u get kawaikunai=not pretty.