Detective K seems to be a ripoff of Detective Dee.
...........................................................................................

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.

Both are about a naive girl seeking revenge, with aid of a smart guy (Matsuda Shota). Both are very similar...........................................

Both are epic Samurai movies. Both movies are very similar. Both movies are based on famous jidaigeki manga........