Arc Five
The fifth spin-off of the franchise

Five special summoning methods: Ritual, Fusion, Synchro, XYZ and Pendulum

So far except for Ritual summon every single of them got somebody with name starting with ‘Yu’ to represent them: Yuya (Pendulum), Yuzu (Fusion), Yuto (XYZ) and Yugo (Synchro)

And there’s also Yushou

Five special summonings, five 'Yu’s, a war between the techniques going on