Raid On Tokyo

Description : A "what-if" alternate history in which the Japanese Self-Defense Forces (JSDF)
fight a desperate struggle against the Soviet Union after it launches
a surprise invasion on Japan during heightened Cold War tensions.
*This is the original story ("Tokyo Wars") as published in 1991,
not the 2008 re-release under the name "Raid on Tokyo",
though there are few differences to note other than the title.