The Sword of Alexander (2007)

Slapstick humour, silly yet Badass demons, parody, breaking fourth wall &.......... Swordplay!!.................................

Both star Hiroshi Abe in lead role.
Both are set partly in classical ancient Greek/western world.
Both take place in Japan.

Both have intense swordplay. Both are based on famous Japanese historical novels by Baku Yumemakura.

Both are about demon slaying swordsman in Warring States period. Both are based on famous manga.....................

Both are epic movies. Both movies are about three Treasures, one being a sword. Both are very similar...........

Both are about a trio, including a master swordsman traveling in search of a mythical dagger..............................

Both movies are about a princess and her bodyguard (Hiroshi Abe) Both movies are very similar.........................