Okay, some incorrect info above about Japan. Standard power is 100V, not 110V. Upgraded is 200V, but not many homes here have an outlet for 200A installed.
Side note: When our homes are built, panels are installed to fit the needs of the home; power companies charge you a monthly fee based on your houses needs/main panel. The larger your panel, the larger the fee, and the fee ramps up quickly. My home is larger than usual, but our builder put in only a 50A panel; we’re in a pinch in the winter if we have guests with an extra room of heating going and can trip a breaker.
Back to our cars, there’s no way my house with a 50A panel can handle decent EV charging without some of the work Hiroshi mentioned. I had the following work done in 2014, but it’s been worth it. My car is kept in an attached garage where there’s a 150A main breaker and box, plus a 100A panel dedicated to our PowerWalls (added in 2021) and car. My P85+ (dual chargers for the OG in the room) came with a Wall Connector, capable of charging at 80A (no one needs this much power anymore—cf. Hiroshi’s suggestions). I went through Tesla at the time, and the company that did it also installs CHAdeMO all around Japan. It was impressive work, and at one point, there were 9 people in my home and garage.
I recommend getting the work done properly to avoid tripping your breakers or worse while you’re charging at night.