Both movies are WWII conspiracy movies. Both movies are very similar..............................................

Both are singing comedy movies. Both movies are very similar...............................................

Detective K seems to be a ripoff of Detective Dee.
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Both movies are about a girl time travelling through a cafe/hotel. Both movies are very similar...................................

Both movies are epic daikaijuu movies. Both movies star Satomi Ishihara...........................................

Both movies are about dogs. Both movies are very similar................................................

Both movies are about cute young girls & their dogs................................................................................

Both are comedy movies about alien invasion. Both movies are very similar....................................................................................

Both movies are about a girl doing Kendo in Kendo club.........................................................

Both are about editors. Both are very similar........................................................................................

Both are about a book girl. Both are based on famous manga. Both are very similar......................................................................................................

Both movies are directed by Takashi Miike, are remakes of classic epic jidaigeki Samurai movies from the 60s.