Buy luxury apartments in Tokyo, Honolulu, Minneapolis. Also, a custom-fitted VIP jet and luxury cars with chauffeurs in each city to shuttle me between and in the cities.
I would donate $1m to the Libertarian Party, $2m to the CATO Institute, $2m to the Reason Foundation, $2m to the Japan-America Society of Minnesota, $2m to marijuana-legalization efforts in Minnesota and the U.S., and $500k to defeat Minnesota State House Representative and thief Phyllis Kahn.
I would found two TV stations in Minneapolis. The first would air entertainment programming selected by me (mainly reruns of 70s and 80s game shows) and the second would be channel that airs right-libertarian news and commentary. I'd probably set up one station in Tokyo that airs bi-lingual programming from both of my Minneapolis stations.
I would buy a small supercomputer from Cray and a top-of-the-line monitor and speaker system. I would also take some of money to fund projects at smaller game studios like Paradox Interactive and rewrite some classic games that need updating (Chris Crawford's Balance of Power, for example.) If I can get by whatever legal requirements necessary, I'd also donate $10m to みんなの党 (minna no to), a new pro-privatization party here in Japan.
I would buy a movie theater to show classic movies from the 1930s to the 1980s. This, like so many others, would not be a profit-driven venture as tickets would be priced at $1 and snacks at similarly low prices.
I would buy the rights to set up Wendy's, A&W, Dairy Queen, and Culver's franchises in major cities in Japan and Hawaii.
I would buy my mother houses in suburban Minneapolis, Honolulu, and northern California. I'd pay off the debts of all of my good friends and family and buy them new cars, electronic equipment, or houses. For a few, I'd also give them enough to retire on so they don't have to keep working.
I'd buy the school I'm currently attending and fire the head of the foreign exchange program and cancel his pension. I'd then have the school rebuilt with new staff in its old location in the city and destroy the new building via artillery bombardment. (One of my friends suggested they remove its foundation and hire a bunch of helicopters to pick it up and drop it into a volcano.
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I'd also hire private tutors to help teach me Japanese and bi-lingual Japanese speakers to translate some Japanese software to English.
That's all I have for now, given that the rest of the money would be saved and invested in various conservative and moderate-risk ETFs, bonds, and whatever the guy at Charles Schwab says.