Internet.
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you buy it off j-list?
You can download the games at various sites and forums, but I highly suggest you buy the game from a site like J-List. At Touhou Wikis you can find the English Patch for the games.
As for now, all the Touhou games (6 to 18) are only available for Windows computers and Mac (running bootcamp). Besides this, the games 1-5 are only available for download on PC-98 computers, which were dropped due to incompatibility. I'm honestly pretty unsure over how to download games 1-5, but you can find the official games on Steam, and can buy Touhou 6 on Amazon. (make sure to look for a trusted seller)
Gensokyo memories revamped-up to 12
Touhou 1-5: PC-98 Touhou >6: Windows Spinoffs: Windows
Touhou Hisōtensoku happened in 2009.
Touhou Hisōtensoku was created on 2009-08-15.
You must be referring to the touhou games. Free trials are downloadable, while you have to pay for the full version.
The Touhou Project was never cancelled. If it was, Japan would be in ruins.