So Jump over yourself has the lyrics Baka Mitai : r/TWEWY

Jump Over Yourself (track), The World Ends With You

The Insert Credit Show

Baka Mitai (I've Been a Fool), Yakuza Wiki

BAKA MITAI, But The Lyrics Are BAD

Vilmu Blues

Baka Mitai (I've Been a Fool), Yakuza Wiki

100 Best Video Game Soundtracks Of All Time

Raimu Rhyme Bito, The World Ends With You

Tenho, The World Ends With You

Jump Over Yourself (track), The World Ends With You

Yakuza - Baka Mitai (Duet version) with lyrics translation 馬鹿みたい Bakamitai (Dame da ne)

ばかみたい (Baka Mitai) (Romanized) – Yakuza

So I think that this isn't Neku and is Best due to similarities in Beat's style and how it would effectively change over 3 years. (Also we haven't seen him without the