Imported amusement machines can contain old cords, unknown conversions and components designed for a different mains system. Electrical safety is one area where a generic internet shortcut is not worth the risk.
Inspect before power
Look for cracked insulation, scorched components, loose plugs, exposed conductors, improvised splices and missing covers. Photograph all power labels and any external transformer or converter.
A plug shape is not a specification
A familiar plug only tells you that someone attached or retained that plug. It does not prove the internal machine is configured correctly for your local supply.
Fuses and protective devices are not optional
If a fuse repeatedly opens or a protection device trips, treat that as a fault to diagnose rather than an obstacle to bypass. Oversizing or bypassing protection can turn a repairable problem into fire or component damage.
Modern machines add complexity
Later cabinets may include multiple supplies, control boards, displays, motors and sensors. Seller-installed home conversions should be documented clearly enough that you know what has changed from the original Japanese configuration.