If you won the lottery of any amount
I personally would buy a small house in Japan and move there after which I would live simply and retire
And get a Japan citizenship
I don’t believe in buying expensive things it’s a waste of money and it would just cause you to go broke faster
So I would only spend on what I have to
Houses in Japan are pretty cheap but very nice
And start a international food restaurant in Japan
Invest it in starting my own business. With some companies in sectors as people say "getting woke and going broke" there is opportunity for big money to be made.
[spoiler]Review sites - the main ones seem willing to change features and block genuine negative reviews all to protect select movies and games.
Video streaming - we've reached a point where there is a daily fear for YouTuber and Twitch streamers that they might get banned or removed just because someone doesn't like them, their opinion or their content.
Comics - mainstream comics are killing themselves. There're removing people, pushing people to indie comics and then crying when those comics are successful. There're deals to be made there and for indies to be brought into the mainstream faster.
Anime - right now there are people trying to censor, remove, or take it over with Japan worried about its future. If a streaming service was started with in house translation, a store for anime products and no censorship it could potentially become big fast.[/spoiler]
[spoiler]But personally I'd probably start up my own game studio and make some big games. I'd make some predatory mobile games as well to farm whale's money (don't worry they'll be available to non-chinese people as well.) [/spoiler]