The franchises official websites World Qualifying Points FAQ For North, Central, and South America Territories simply states that Duelists must be legal residents of the territory they wish to represent and provide valid proof of residency. Admittedly, foreigners living in Japan and playing with Japanese-language cards make up a pretty small subset of the Yu-Gi-Oh player base, so its not shocking that the demographic wasnt a major priority in crafting the Japan Championship rules
Nemleria, Tenpai Dragon, Purreley, Dinomorphia, Floowandereeze, Labrynth, Exodia, and Runick Stun are all viable and affordable options
(2) If your opponent Normal or Special Summons a monster(s), or this card is targeted for an attack: You can target 1 Beast monster in your GY
10 Gravekeepers Gravekeepers is a deck built around a single field spell, Necrovalley
To the right collector, these cards can be worth about $300-$2,000, with rare gem mints selling as high as $6,000-$7,000