Is it because Japanese pronunciation is easier to pick up than Mandarin? Also, is there a such thing as “Chinese” anime (as in made in China / Taiwan being originally in Mandarin), they do have an equvalent of Manga known as Manhua (漫畫) but is it even popular to the same extent as the Japanese counterparts? Why do those types of foreigners favor Japanese (language) over Mandarin regarding pronunciation?
Are sentences in Japanese easier to pronounce in comparison to Mandarin? JP does not have tones (rather pitch accent) with an “alphabet” of some sort (known as ひらがな & カタカナ) even though they have 漢字 (Furigana is used for placing kana above Kanji for native speakers to understand) while Mandarin places a big emphasis on tones and its entirelty written in 漢字 (for transliteration, either Pinyin or Bopomofo is used).
Honestly, I don’t see any reason for weebs to like the Japanese language other than their love for Japanese anime, which is immensely popular. I actually have a close friend who speaks Japanese sentences, even though the language is completely different from our language, and learning any language, especially Asian ones, is very difficult! But being passionate about a language and surrounding yourself with it makes it much easier.